A person saves 10% of his salary every month. If his salary increases by 12% and the expenditure increases by 10%, then what will be the change in his saving per month?
A.20% increase
B.30% increase✓ Correct
C.03% decrease
D.02% decrease
Explanation
Let original salary = 100. Saving = 10, expenditure = 90. New salary = 112. New expenditure = 90 × 1.10 = 99. New saving = 112 - 99 = 13. Change in saving = 13 - 10 = 3, which is a 30% increase over original saving of 10.
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