A number is increased by 25%. . By what percentage must the new number be decreased to get back to the original number?

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A 10
B 25
C 20
D 15

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Answer: C. 20

If a number is increased by 25%, we can assume the original number is 100. After increasing it by 25%, the new number becomes 125. To get back to 100, we need to decrease 125 by 25. Since the percentage decrease is calculated using the new number (125) as the base, we calculate 25/125 x 100=20% . Therefore, the number must be decreased by 20% to return to its original value.

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A number is increased by 25%. . By what percentage must the new number be decreased to get back to the original number?

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