Given:
The actual volume of the container is a = 0.5 liter.
The estimated volume of the container is e = 0.3 liter.
The objective is to find the percentage of student's estimate off.
Explanation:
The general formula to find the percentage of estimate off is,
[tex]\text{ \%e =}\frac{a-e}{a}\times100\text{ . . . . (1)}[/tex]On plugging the given values in equation (1),
[tex]\begin{gathered} \text{\%}e=\frac{0.5-0.3}{0.5}\times100 \\ =\frac{0.2}{0.5}\times100 \\ =\frac{200}{5}\text{ \%} \\ =40\text{ \%} \end{gathered}[/tex]Hence, the percentage of student's estimate off is 40%.