WAEC - Mathematics (2005 - No. 45)
The monthly salary of a man increased from N2,700 to N3,200. Find the percentage increase
10%
15%
15.6%
18.5%
คำอธิบาย
\(\% increase = \frac{Increase}{initial\hspace{1mm} salary}\times 100\%\)
Increase = N3,200 - N2,700 = N500
Initial \(\hspace{1mm} salary = N2,700.00 = \frac{N500}{N2,700}\times 100\% = 18.5\%\)
Increase = N3,200 - N2,700 = N500
Initial \(\hspace{1mm} salary = N2,700.00 = \frac{N500}{N2,700}\times 100\% = 18.5\%\)