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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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.
1 answer