Question

A party planner estimated that 120 people would attend an event, but only 100 people showed up. What was the planner's percent of error?

Answer 1

The party planner estimated that 120 people will attend the event but only 100 people showed up. The percentage error can be calculated below

$\begin{gathered} \text{percentage error = }\frac{\text{estimated -exact}}{\text{exact}}\times100 \\ \text{percentage error = }\frac{120-100}{100}\times100 \\ \text{percentage error }=\frac{2000}{100} \\ \text{percentage error }=\text{ 20\%} \end{gathered}$