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Substitute 17 for a and 25 for b .

a. b. SOLUTION. Write a proportion where 25 is the base and 17 is a part of the base. p. p. 100. 100. =. 17. =. 25. EXAMPLE 1. Find a percent using a proportion. What percent of 25 is 17?. Write proportion. Substitute 17 for a and 25 for b. 17 is 68% of 25.

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Substitute 17 for a and 25 for b .

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  1. a b SOLUTION Write a proportion where 25 is the base and 17 is a part of the base. p p 100 100 = 17 = 25 EXAMPLE 1 Find a percent using a proportion What percent of 25 is 17? Write proportion. Substitute 17 for aand 25 for b.

  2. 17 is 68% of 25. ANSWER EXAMPLE 1 Find a percent using a proportion 1700 = 25p Cross products property. 68 = p Divide each side by 25.

  3. Use a proportion to answer the question. 1. What percent of 20 is 15? 75% ANSWER for Example 1 GUIDED PRACTICE

  4. ANSWER 27 for Example 1 GUIDED PRACTICE Use a proportion to answer the question. 2. What number is 30% percent of 90?

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