1
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Question

# Chen donates 15 percent of his current salary to charity. If his pay is increased by 10 percent and he still continues to donate 15 percent of the salary, by what percentage do his charity contributions increase?

A
5
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B
10
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C
15
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D
20
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Solution

## The correct option is C 10Let the salary of Chen is Rs 100He donate 15% to charity the he donate Rs 15If his salary increase 10% the his new salary is 110Now he donate 15% to charity then he donate =110×15100=Rs.16.5His contribution increase =16.5−15=Rs.1.5Increase %=1.515×100=10 %

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