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Problem-Solving and Data AnalysisHardPercent increase in a bill

Problem-Solving and Data Analysis practice question

A household's monthly water bill rose from $60 to $66. By what percent did the bill increase?

Answer: 10

6/60 = 10%.

Common wrong answers

If you answered 6
6 is the increase in dollars.
If you answered 110
110 is the new bill as a percent of the old.
If you answered 9.09
9.09 divides 6 by 66, the new amount.

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