Question

Millie expected 20 friends to show up to her birthday party, but 24 attended. What was

her percent error? Round to the nearest percent.

Answer 1

Her percent error was: ≈ 17% (whole percent)

Explanation:

Given

Approximate value = 20 friends

Exact Value = 24 friends

To determine

Percent error

Using the formula to calculate the Percent error

Percent error = | Approximate Value| - Exact Value | / | Exact value | × 100

= | 20 - 24 | / | 24 | × 100

= | - 4 | / | 24 | × 100

Apply absolute value: |-a| = a, a>0

= 4/24 × 100

= 16.67 %

≈ 17% (whole percent)

Thus, her percent error was: ≈ 17% (whole percent)