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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.

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Presentation on theme: "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."— Presentation transcript:

1 Percent of a Number Mrs. Herron

2 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.

3 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/100 60.3 = n 60.3 = n 67% of 90 is 60.3 67% of 90 is 60.3

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

5 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 4. 0.5% of 36 = 0.5% of 36 =

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

7 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.


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