WAEC - Mathematics (2022 - No. 12)

The length of a piece of stick is 1.75 m. A boy measured it as 1.80 m. Find the percentage error

4\(\frac{4}{7}\)

2\(\frac{6}{7}\)

2\(\frac{7}{9}\)

4\(\frac{7}{9}\)

Error = 1.80 - 1.75 = 0.05

%error = \(\frac{error}{original length}\)

= \(\frac{0.05 * 100}{1.75}\)

= 2.85 or 2\(\frac{6}{7}\)