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%
waec 2005mathematics

The correct answer is C. 17.5%

\(\%Increase = \frac{Actual \hspace{1mm}increase}{initial \hspace{1mm}ratio}\times 100\%\)

Actual increase = 7; Initial ratio = 40

\(=\left(\frac{7}{40} \times 100\%\right)=\frac{35}{2}=17.5\%\)

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