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2017 AMC 10B Problem 12

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2017 AMC 10B Problem 12AMC 10 Step by Step

Name: Date: September 13, 2026

Ratios, Percents & Averages · difficulty 2 of 5 · about 3 min · position P11-15

Elmer's new car gives $50\%$ better fuel efficiency. However, the new car uses diesel fuel, which is $20\%$ more expensive per liter than the gasoline the old car used. By what percent will Elmer save money if he uses his new car instead of his old car for a long trip?

A)
$20\%$
B)
$26\tfrac23\%$
C)
$27\tfrac79\%$
D)
$33\tfrac13\%$
E)
$66\tfrac23\%$

2017 AMC 10B Problem 12

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