Aatikah plans to buy a book at a book fair she think she will need $30 to purchase the books she only spends $19.75. Find the percent error in her prediction round your answer to the nearest whole number.

Question

52%
2%
58
1%

Answer 1

To find the percent error, we need to calculate the difference between the predicted cost and the actual cost, divide by the predicted cost, and then multiply by 100:

Percent Error = (|actual cost - predicted cost| / predicted cost) * 100

Percent Error = (|19.75 - 30| / 30) * 100

Percent Error = (| -10.25| / 30) * 100

Percent Error = (10.25 / 30) * 100

Percent Error ≈ 0.3416666667 * 100 ≈ 34.16666667

Rounding to the nearest whole number, the percent error is 34%.