Question

The weight of a sand bag is 40 kg. In a hurry it was weighted as 40.8 kg. The error percentage is

Answer 1

$\huge\pink{Answer\: is}$

Weight = 40 kg
Difference is 40.8 - 40
=0.8
Percentage error =
$= \frac{0.8}{40} \times 100 \\ = 20\%$
Hope it helps you

Answer 2

$\huge\boxed{\texttt{\fcolorbox{red}{aqua}{hey mate!!!}}}$
Weight = 40 kg
Difference is 40.8 - 40 
=0.8
Percentage error = 
$\frac{0.8}{40} \times 100 \\ =2$