QuestionJAMBGeneral Maths2015ObjectiveCommercial arithmeticCommercial arithmetic
After getting a rise of 15%, a man's new monthly salary is ₦345. How much per month did he earn before the increase?
Worked solution (try it first)
After a
15% rise the new salary is
115% of the old one
S:
1.15S=345.
Divide both sides by 1.15:
S=300.
So he earned ₦300 a month before, option C.
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