Question

What is the relative error of a distance given as 550cm plus or minus 24.2cm?

Answer 1

$\frac{ 24.2}{550} \cdot100\%= \frac{24.2\cdot100}{550} \%= \frac{242}{55} \%= \frac{22}{5} \%=4.4\%$

Answer 2

24.2 / 550 = 0.044

The relative error is plus or minus 4.4 percent .