The salary of a man was increased in the ratio 40:47. calculate the percentage increase
MATHEMATICS
WAEC 2005
The salary of a man was increased in the ratio 40:47. calculate the percentage increase in the salary
- A. 85.1%
- B. 58.5%
- C. 17.5%
- D. 14.9%
Correct Answer: C. 17.5%
Explanation
\(\%Increase = \frac{Actual \hspace{1mm}increase}{initial \hspace{1mm}ratio}\times 100\%\)
Actual increase = 7; Initial ratio = 40
\(=\left(\frac{7}{40} \times 100\%\right)=\frac{35}{2}=17.5\%\)
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