A sales boy gave a change of N68 instead of N72. Calculate his percentage error

Correct Answer: Option B

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})%