SOLUTION: Last week Anna ran 20 miles. This week she ran 25 miles. The increase is what percent of the number of miles she ran last week?

Algebra ->  Algebra  -> Percentage-and-ratio-word-problems -> SOLUTION: Last week Anna ran 20 miles. This week she ran 25 miles. The increase is what percent of the number of miles she ran last week?      Log On

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Question 274161: Last week Anna ran 20 miles. This week she ran 25 miles. The increase is what percent of the number of miles she ran last week?
Answer by fractalier(2101) About Me  (Show Source):
You can put this solution on YOUR website!
Percentage increase = [(New - Old) / Old] x 100%
so if we plug in we get
% increase = [(25 - 20) / 20] x 100% = (5/20) x 100% = 25%