# Pre-Algebra

In 2002 the rate for a first class U.S. postage stamp increased to \$0.37. This represent a \$0.34 increase since 1917. What is the percentage increase of postage since 1917?

Solve the problem using a proportion.

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1. You want to subtract the price change and divide it by the original number. It would be set up as amount of change/original amount. Hope that helps.

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