When the price of a watch was decreased by 20 it 39 s selling increases by 60 What was the effect on...........

Quantitative Aptitude (CDS) Percentage

When the price of a watch was decreased by 20 %, it's selling increases by 60%. What was the effect on the total revenue?

30% decrease

29% increase

28% increase

31% decrease

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Explanation:

Let the price of the watch be Rs. 100
and let the original sale be 100 pieces.
Then, Total Revenue = Rs. (100x100) = Rs. 10000
New revenue = Rs. (80x160) = Rs. 12800
Increase in revenue = 12800-10000 = Rs. 2800
Increase in revenue % = (2800/10000)100 = 28%