After getting a rise of 15%, a man's new monthly salary is N345. How much per month did he earn before the increase?
The correct answer is C. N300
Let's say that the man's monthly salary before the increase was x.
After getting a rise of 15%, his new monthly salary is
x + 0.15x = 1.15x.
We are told that his new monthly salary is N345, so we can set up an equation to find his original salary:
1.15x = 345
\(x = \frac{345}{1.15} = 300\). Therefore, he earned N300 per month before the increase.
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