Irina predicted that she would sell 75 books, but she actually sold 95 books. 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 Books 75 95 negative 20 20

Percent error is the absolute error divided by the exact value, then multiplied by 100. The table gives an absolute error of 20 books and an exact value of 95 books, so the expression is 20 ÷ 95 × 100. Choice C uses those values; using 75 would divide by the approximate value instead.

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