Key to Percents

Key To Percents - Percents and DecimalsKey to Percents emphasizes mental computation and estimation skills—because most work with percents is done without pencil and paper. Then students are taught to solve percent problems using equal fractions and decimal multiplication. Finally, percents are used to solve word problems in a variety of applications.

Key to Percents assumes only a knowledge of fraction and decimal computation. Minimal reading is required, so students can work independently or in small groups.

  • Book 1: Percent Concepts
  • Book 2: Percents and Fractions
  • Book 3: Percents and Decimals
  • Answers and Tests available separately

View sample pages.

Note: Key to... workbooks are now published by McGraw-Hill Education and available for purchase at If you're a customer in a U.S. territory or outside the United States, find ordering information here.

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We used this set with our son who hates math, and he absolutely loved it. We particularly liked the fact that they look at problems and study them from very different perspectives, so kids will get the concept one way or another. It really is a great buy! —Scott Zimmer, Parent, San Diego, CA