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Math
Prealgebra
Percents

Percents

When you deposit money in a savings account at a bank, it earns additional money. Figuring out how your money will grow involves understanding and applying concepts of percent. In this chapter, we will find out what percents are and how we can use them to solve problems.

Sections

  • Understand Percent — using the definition of percent as a ratio out of 100, converting percents to fractions and decimals, and converting decimals and fractions to percents.
  • Solve General Applications of Percent — translating and solving basic percent equations, and finding percent increase and decrease.
  • Solve Sales Tax, Commission, and Discount Applications — computing sales tax and total cost, commission, discount and mark-up.
  • Solve Simple Interest Applications — using the simple interest formula to find interest, principal, rate, or time.
  • Solve Proportions and their Applications — writing and solving proportions, and using them to solve percent and similar-figure applications.

This chapter overview is adapted from Prealgebra 2e, Chapter 6 Introduction by Lynn Marecek, MaryAnne Anthony-Smith, and Andrea Honeycutt Mathis, © OpenStax, licensed under CC BY-NC-SA 4.0. Access the original for free at openstax.org. Changes: condensed the chapter introduction and recast the chapter outline as a section list.

Simplify and Use Square RootsUnderstand Percent