Car x used k gallons of gas while traveling p miles and car, Ask an Expert

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Car X used k gallons of gas while traveling p miles, and car Y used s gallons of gas while traveling r miles. What was the ratio of the number of miles per gallon for car X to the number of miles per gallon for the car Y?

a. kr/ps b. ks/pr c. pr/ks d ps/kr

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