JAMB - Mathematics (2008 - No. 6)
The cost of kerosene per liter increased from N60 to N85. What is the percentage rate of increase?
42%
41%
40%
25%
설명
N85 - N60 = N25 increase
∴percentage increase = \(\frac{25}{60}\times \frac{100}{1}\) = \(\frac{125}{3}\) = 41.67%
= 42%
∴percentage increase = \(\frac{25}{60}\times \frac{100}{1}\) = \(\frac{125}{3}\) = 41.67%
= 42%