Mastering Piecewise Function Latex for Mathematical Professionals in 2023

What is Percentage? How to solve percent word problems.

Do you know how percent marks you obtained in your high school. 

Do you know what percent of 5 is 3?

Can you calculate the percentage of an number?

If you  don’t know how to solve percentage world problems, then this blog is for you.  Here we discuss all the tips and tricks and discuss different methods to solve the percentage problems easily.

As a student, I always struggled with percent word problems. They seemed so complicated and confusing. But as I learned more about percentages and practiced solving different types of percent word problems, I became more confident and capable in this area. In this article, I’ll share my tips and tricks for mastering percent word problems so that you can approach them easily and confidently.

Introduction to Piecewise Functions

Examples of Percent word problems

Piecewise functions are essential tools used by mathematical professionals to define functions that have different rules or formulas for different intervals or domains. These functions are commonly used in various branches of mathematics, such as calculus, algebra, and statistics. Mastering the art of writing and typesetting piecewise functions in LaTeX can greatly enhance the readability and professionalism of mathematical documents.

What is LaTeX, and why is it useful for mathematical professionals?

Percent word problems

LaTeX is a typesetting system widely used in the academic and scientific community for producing high-quality documents. It provides a powerful and flexible way to format complex mathematical equations, symbols, and notations. LaTeX is particularly useful for mathematical professionals because it allows them to express mathematical concepts and formulas with precision and elegance. It also provides various mathematical symbols and environments, making it suitable for writing complex mathematical expressions like piecewise functions.

Basics of piecewise function LaTeX syntax

To write piecewise functions in LaTeX, you must understand the basic syntax and commands. LaTeX uses a mark-up language that allows you to define mathematical expressions using a combination of text and special commands. The basic syntax for a piecewise function in LaTeX is as follows:

f(x) = \begin{cases}

    expression1 & \text{if condition1} \\

    expression2 & \text{if condition2} \\

    \ldots \\

    expressionn & \text{if conditionn}



In this syntax, the case environment defines the different cases or expressions of the piecewise function. The & symbol separates the expression from the condition, and the \\ symbol indicates the end of each case. The \text{} command is used to include text within the piecewise function.

Typesetting piecewise functions with the cases environment in LaTeX

The case environment is the most commonly used environment for typesetting piecewise functions in LaTeX. It provides a clear and organized way to express different cases and their corresponding expressions. Here is an example of a simple piecewise function typeset using the cases environment:

f(x) = \begin{cases}

    x^2 & \text{if } x < 0 \\

    x+1 & \text{if } x \geq 0


In this example, the piecewise function f(x) is defined as x^2 for x less than 0, and x+1 for x greater than or equal to 0. The cases environment automatically aligns the expressions and conditions, creating a clear and visually appealing representation of the piecewise function.

Adding conditions and multiple cases in piecewise functions

Piecewise functions often involve multiple cases and complex conditions. LaTeX provides various techniques to handle such situations and ensure the accurate representation of these functions. To add conditions to a case, you can use the \text{} command followed by the condition within the & symbol. Here is an example of a piecewise function with multiple cases and conditions:

f(x) = \begin{cases}

    x^2 & \text{if } x < 0 \\

    x+1 & \text{if } 0 \leq x < 5 \\

    2x-3 & \text{if } x \geq 5


In this example, the piecewise function f(x) has three cases with different expressions and conditions. The conditions are specified using the \text{} command within the & symbol. LaTeX handles the alignment of the expressions and conditions automatically, resulting in a well-structured piecewise function.

Formatting options for piecewise functions in LaTeX

Percent Word problems solved examples

LaTeX provides various formatting options to customize the appearance of piecewise functions. You can modify the font, size, and style of the expressions and conditions to match your document’s requirements. LaTeX also allows you to add vertical space between cases or use different delimiters for the case environment. Here are some examples of formatting options for piecewise functions:

  • Changing the font size of the expressions and conditions:


f(x) = \begin{cases}

    x^2 & \text{if } x < 0 \\

    x+1 & \text{if } 0 \leq x < 5 \\

    2x-3 & \text{if } x \geq 5



  • Adding vertical space between cases:

f(x) = \begin{cases}

    x^2 & \text{if } x < 0 \\[10pt]

    x+1 & \text{if } 0 \leq x < 5 \\[10pt]

    2x-3 & \text{if } x \geq 5



  • Using different delimiters for the cases environment:

f(x) = \left\{


    x^2 & \text{if } x < 0 \\

    x+1 & \text{if } 0 \leq x < 5 \\

    2x-3 & \text{if } x \geq 5




These formatting options allow you to design piecewise functions that are visually appealing and easy to read.

Common mistakes and troubleshooting tips for writing piecewise functions in LaTeX

While writing and typesetting piecewise functions in LaTeX, it is common to encounter some mistakes or face challenges. Here are some common mistakes and troubleshooting tips to help you overcome these issues:

  • Missing or mismatched delimiters: Use the correct delimiters (\{ and \}) for the cases environment. Mismatched or missing delimiters can cause errors or produce unexpected results.
  • Incorrect alignment: LaTeX automatically aligns the expressions and conditions in the case environment. If your piecewise function doesn’t align correctly, check for missing & symbols or incorrect line breaks (\\).
  • Improper use of math mode: Remember to enclose mathematical expressions in math mode ($…$ or \( … \)) to ensure correct typesetting. Failure to do so can result in errors or inconsistent formatting.
  • Inconsistent use of text mode: When including text within the piecewise function, make sure to use the \text{} command. Failure to use text mode can result in errors or incorrect spacing.

By being aware of these common mistakes and following the troubleshooting tips, you can avoid potential issues and produce accurate and professional-looking piecewise functions in LaTeX.

Advanced techniques for customizing piecewise functions in LaTeX

LaTeX offers advanced techniques to customize and enhance piecewise functions’ appearance. These techniques allow you to add elements like labels, braces, or arrows to make your piecewise functions more visually appealing and informative. Here are some advanced techniques for customizing piecewise functions:

  • Adding labels to cases: You can add labels to each case using the \text{} command and the array environment. Here is an example:

f(x) = \begin{cases}

    x^2 & \text{if } x < 0 \text{ (Case 1)} \\

    x+1 & \text{if } 0 \leq x < 5 \text{ (Case 2)} \\

    2x-3 & \text{if } x \geq 5 \text{ (Case 3)}



  • Using braces or arrows: You can use the \left\{ and \right. commands to add braces around the cases or the \xrightarrow{} command to add arrows. Here is an example:

f(x) = \left\{


    x^2 & \text{if } x < 0 \\

    x+1 & \text{if } 0 \leq x < 5 \\

    2x-3 & \text{if } x \geq 5



These advanced techniques allow you to create customized piecewise functions effectively communicating mathematical concepts and ideas.

Useful resources and tools for working with piecewise functions in LaTeX

When working with piecewise functions in LaTeX, it can be helpful to have access to additional resources and tools. Here are some useful resources and tools that can assist you in mastering piecewise function LaTeX:

  • LaTeX documentation: The official LaTeX documentation provides detailed information and examples on using the cases environment and other related commands. It can be accessed online or downloaded as a PDF.
  • LaTeX editors: LaTeX editors, such as Overleaf, TeXstudio, and Texmaker, offer a user-friendly interface and built-in features for writing and typesetting mathematical expressions, including piecewise functions.
  • Online LaTeX communities: Online communities, such as TeX Stack Exchange and LaTeX Forum, provide platforms for asking questions, seeking help, and sharing knowledge related to LaTeX and its various applications, including piecewise functions.

Utilizing these resources and tools can enhance your proficiency in working with piecewise functions in LaTeX and overcome any challenges you may encounter.


Mastering the art of writing and typesetting piecewise functions in LaTeX is an essential skill for mathematical professionals. By understanding the basics of LaTeX syntax, using the cases environment effectively, and utilizing formatting options and advanced techniques, you can create visually appealing and professional-looking piecewise functions in your mathematical documents. Remember to consult useful resources and tools to further enhance your expertise in working with piecewise functions in LaTeX. With practice and dedication, you can become proficient in mastering piecewise function LaTeX and elevate the quality of your mathematical work.


You can solve the percent word problems by these simple steps.

  1. – Identify the things you have been given and need to find.
  2. Create an equation with the following formula and variables for the unknowable numbers.

$$\text{percent} \times \text{base} = \text{amount}$$

2.  Find the required variable by solving the equation.

3. Reentering the equation with your answer will allow you to verify it.

In daily life, % is often used for the following purposes:

  • To figure out the tip at a restaurant. If your bill is $20 and you want to tip 15%, for instance, you would multiply $20 by 0.15 to get $3, which is the tip amount.
  • Calculating the item’s sales tax. If a book costs $12 and the sales tax is 8%, for instance, you would multiply $12 by 0.08 to get $0.96, which is the tax amount.
  • To determine product discounts. For instance,

    If a $25 blouse is on sale for 20% off, you multiply $25 by 0.2 to obtain $5, representing the discount. The final cost of the shirt is $20 after deducting $5 from the original $25.

  • To calculate your class grade. For instance, if you received 80 out of 100 possible points on a test, you would divide 80 by 100 to get 0.8, equal to 80%. Your test score is, therefore, 80%.

  • To calculate your baseball/softball batting average. For instance, if you had 100 at-bats and 30 hits, you would divide 30 by 100 to obtain 0.3, or 30%. Your batting average is 30% as a result.

  • If you want to convert the percentage to decimal, then divide the given value by 100.
  • If convert the decimal to percentage than multiply given number to 100 and put the percent sign.

Let’s solve this word problem:
**A shirt costs $40 and is on sale for 25% off. What is the sale price of the shirt?**

  • We are given the original price ($40) and the percent off (25%).
  • We need to find the sale price, which is the amount after the discount.
  • We can write an equation using the formula:

$$\text{percent off} \times \text{original price} = \text{discount amount}$$

$$0.25 \times 40 = x$$

where x is the discount amount.

  • We can solve for x by multiplying both sides by 4:

$$x = 4 \times 0.25 \times 40$$

$$x = 10$$

  • So, the discount amount is $10.
  • To find the sale price, we need to subtract the discount amount from the original price:

$$\text{sale price} = \text{original price} – \text{discount amount}$$


$$\text{sale price} = 40 – 10$$

$$\text{sale price} = 30$$

So, the sale price of the shirt is $30.

  • We can check our answer by plugging it back into the equation:

$$0.25 \times 40 = 10$$

which is true.

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