Key to Percents, Book 3: Percents and Decimals

Key to Percents emphasizes mental computation and estimation skills. 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 knowledge of fraction and decimal computation.

Book 3 covers percents and decimals, including simplification and figuring out how to write a number as a percent, fraction and decimal number.