Question

You guess there are 80 marbles in a jar but there are actually 50. what is the percent of error

Answer 1

Calculate value = 80

Actual value = 50

`\begin{gathered} \text{Percentage error = }\frac{Calculated\text{ value - Actual vale}}{\text{Actual value}}\text{ X 100\%} \\ =\text{ }\frac{80\text{ - 50}}{50}\text{ x 100} \\ =\text{ }\frac{30\text{ x 100}}{50} \\ =\text{ }(3000)/(50) \\ =\text{ 60\%} \end{gathered}`