Lesson 5-3

The Percent Proportion

Definition

• Percent Proportion -

Example 1

• 22 is what percent of 110?

22 100 ÷ 110 = x

x = 20

Examples

• 34 is what percent of 136?

• 34 100 ÷ 136 = x

• x = 25

Example 2

• What number is 80 % of 500?

80 500 ÷ 100 = x

x = 400

• What number is 70% of 600?

70 600 ÷ 100 = x

x = 420

In 1804-1806, Lewis and Clark Expedition reported that it rained 94 days, which was about 89% of their days in Oregon. How many days did the expedition spend in Oregon?

Example 3

94 100 ÷ 89 = x

x ≈ 105.6 or 106 days.

From 1999 to 2001, Derek Jeter had 11 hits with the bases loaded. This was about 30% of his at bats with the bases loaded. How many times was he at bat with the bases loaded?

Example

11 100 ÷ 30 = x

x ≈ 36.7 or 37 at bats