Difference between revisions of "2017 AMC 10B Problems/Problem 12/section=4"
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Latest revision as of 10:46, 19 February 2019
Solution 3
You can find that the ratio of fuel used by the old car and the new car in a same amount of distance is , and the ratio between the fuel price of these two cars is . Therefore, by multiplying these two ratios, we get that the costs of using these two cars is So the percentage of money saved is .