Percent of a Number Mrs. Herron

I can… Find the percent of a number. A percent is a part of 100. Since it is part of 100, we can set up proportions to find the answer.

Using Proportions to find Percents 67% of 90 67/100 = n/90 67/100 = n/90 67 x 90 = 100 x n 67 x 90 = 100 x n 6,030 = 100n 6,030 = 100n 6,030/100 = 100n/100 6,030/100 = 100n/ = n 60.3 = n 67% of 90 is % of 90 is 60.3

Helpful hint When solving a problem with a percent greater than 100%, the part will be greater than the whole. 145% of 210

Using Decimal Equivalents Find the percent of each number. Check whether your answer is reasonable. 8% of 50 8% of 50 = 0.08 x 50 8% of 50 = 0.08 x 50 = 4 = 4 Since 10% of 50 is 5, a reasonable answer for 8% of 50 is % of 36 = 0.5% of 36 =

Describe Describe a situation in which you might need to find a percent of a number.

Convincing Argument Using the steps for an argument with the following question below: Explain how to set up a proportion to find 150% of a number.