WAEC - Mathematics (2024 - No. 10)
A trader gave a change of # 540.00 instead of # 570.00 to a customer. Caculate the percentage error.
5\(\frac{5}{19}\)%
5\(\frac{5}{9}\)%
5\(\frac{7}{19}\)%
5\(\frac{7}{9}\)%
Wyjaśnienie
% error = \(\frac{\text{Error}}{\text{Actual value}}\) x 100%
Error = #570 - #540 = #30
% error = \(\frac{30}{570}\) x 100%
= \(\frac{100}{19}\)% = 5\(\frac{5}{19}\)%