WAEC - Mathematics (2013 - No. 7)
A sales boy gave a change of N68 instead of N72. Calculate his percentage error
4%
5\(\frac{5}{9}\)%
5\(\frac{15}{17}\)%
7%
Explanation
% error = \(\frac{error}{\text{actual value}} \times 100\)
error = N72 - N68 = 4
actual value = N72
%error = \(\frac{4}{72} \times 100\)
= \(\frac{100}{18} = \frac{50}{9}\) = 5\(\frac{5}{9}\)%
error = N72 - N68 = 4
actual value = N72
%error = \(\frac{4}{72} \times 100\)
= \(\frac{100}{18} = \frac{50}{9}\) = 5\(\frac{5}{9}\)%
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