ANSWER
4%
EXPLANATION
We want to find the perecntage error in the given situation.
Percentage error is given as:
[tex]\text{ \%error = }\frac{|x_2-x_1|}{x_1}\cdot\text{ 100}[/tex]where:
x1 = expected value of weight
x2 = measured value of weight
The numerator represents the absolute value of the difference between the two weights.
Therefore, the percentage error is:
[tex]\begin{gathered} \text{ \%error = }\frac{|2.4\text{ - 2.5}|}{2.5}\cdot\text{ 100 = }\frac{|-0.1|}{2.5}\cdot\text{ 100} \\ \text{ \%error = }\frac{0.1}{2.5}\cdot\text{ 100 = 0.04 }\cdot\text{ 100} \\ \text{ \%error = 4\%} \end{gathered}[/tex]The percentage error is 4%.