ReteachCh1-2c

# ReteachCh1-2c - Since 0.2 = 20 12 is 20 of 60 Note that the...

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NAME _________________________________________ DATE ______________ PERIOD _______ Algebra: The Percent Proportion and Equation In a percent proportion , one ratio compares a part to the whole. The other ratio is the equivalent percent written as a fraction with a denominator of 100. A percent equation is an equivalent form of a percent proportion in which the percent is written as a decimal. part = percent • whole Example 12 is what percent of 60? METHOD 1 Use the percent proportion. 12 • 100 = 60 • p 1,200 = 60 p 20 = p Write the percent proportion. Find the cross products. Multiply. Divide each side by 60. Simplify. So, 12 is 20% of 60. METHOD 2 Use the percent equation. Write the percent equation. Divide each side by 60. Simplify.

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Unformatted text preview: Since 0.2 = 20%, 12 is 20% of 60. Note that the answer, a decimal, must be converted to a percent. Algebra: The Percent Proportion and Equation http://glencoe.com/sites/common_assets/mathematics/0078916. .. 1 of 2 9/23/10 9:47 AM Exercises Solve each problem using a percent proportion. 3 is what percent of 10? 1. What number is 15% of 40? 2. 24 is 75% of what number? 3. 45 is what percent of 60? 4. Solve each problem using a percent equation. Find 30% of 70. 5. 52 is what percent 65? 6. What percent of 56 is 14? 7. Find 180% of 160. 8. Chapter 1 41 Course 3 Algebra: The Percent Proportion and Equation http://glencoe.com/sites/common_assets/mathematics/0078916. .. 2 of 2 9/23/10 9:47 AM...
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## This note was uploaded on 04/19/2011 for the course MTH 110 taught by Professor Helenius during the Winter '08 term at Grand Valley State.

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ReteachCh1-2c - Since 0.2 = 20 12 is 20 of 60 Note that the...

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