Last year, Raul estimated that he would need 480 night lights, but he sold 420 night lights. This year, he bought 425 night lights and only sold 375. Which set of statements about the percent errors for the two years is true?
Answer
A
The percent error for this year was lower. Raul estimated better last year.
B
The percent error for this year was higher. Raul estimated better last year.
C
The percent error for this year was lower. Raul estimated better this year.
D
The percent error for this year was higher. Raul estimated better this year.
Explanation
Percent error is the absolute difference between the estimate and the actual amount, divided by the actual amount. Last year, the error was 60 night lights, so the percent error was 60 ÷ 420 ≈ 14.3%. This year, the error was 50 night lights, so the percent error was 50 ÷ 375 ≈ 13.3%; it was lower, meaning Raul estimated better this year.
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