18
QuizMultiple Choice

Proportional Reasoning with Percents — Test

Question 18 • Grade 7 Mathematics

Sameera predicted that she would sell 38 blankets, but she actually sold 28 blankets. Which expression would find the percent error? Use the given table to help answer the question. Percent Error Item Approximate value Exact value Error Absolute error Ratio Percent error Blankets 38 28 10 10

Answer
A
10 over 28
B
10 over 38
C
10 over 38 times 100
D
10 over 28 times 100

Explanation

Percent error is the absolute error divided by the exact value, then multiplied by 100. Here, the absolute error is 10 blankets and the exact number sold is 28, so the expression is 10 ÷ 28 × 100. Choice D gives this expression; using 38 would divide by the predicted value instead of the exact value.

AI-written and checked against the verified answer.

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