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Common Core Math 7.rp.1

Ratios And Proportional Relationships: Analyze Proportional Relationships And Use Them To Solve Real-World And Mathematical Problems.

Compute unit rates associated with ratios of fractions, including ratios of lengths, areas and other quantities measured in like or different units. For example, if a person walks 1/2 mile in each 1/4 hour, compute the unit rate as the complex fraction 1/2/1/4 miles per hour, equivalently 2 miles per hour.