Question
The salary of a person is increased by 20% and then
decreased by 10%. What is the net percentage change in the salary?Solution
Let original salary = 100 After 20% increase: New salary = 100 + 20% of 100 = 120 After 10% decrease: Final salary = 120 − 10% of 120 = 120 − 12 = 108 Net change = 108 − 100 = 8 increase Net percentage change = (8/100) × 100% = 8% increase
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