Key to Percents emphasizes mental computation and estimation skills since most work with percents is done without pencil and paper. Afterwards, students are taught to solve percent problems using equal fractions, decimal multiplication and word problems in a variety of applications. Key to Percents assumes only knowledge of fraction and decimal computation. 45 pages, paperback.
Book 2 covers percents and fractions, including how to make fractions equal with percents, simplest form, finding percents, and more.