By Steve Wyborney
First, students figure out what larger number a smaller number is part of; for example, 9 is 25% of what number? Using equivalent fractions and models, students see that 9 is 25% (or one-fourth) of 36.
Next, students learn the decimal equivalent of a percent; for example, 56% = 0.56. Armed with this knowledge, students find the whole given a part and the percent through division. For example, to find out what number 3 is 5% of, we divide 3 by 0.05. To simplify the process, we multiply the divisor (0.05) by 100 to turn it to a whole number. We then multiply the dividend by 100 as well, so now we divide 300 by 5 and find out that 3 is 5% of 60.
This PowerPoint lesson is a multi-click animation sequence that introduces standards-based math skills and concepts. Also includes three practice pages at levels A (below grade level), B (at grade level), and C (above grade level), which may be distributed according to students' abilities!