Discussion

A number is first increased by 10% and then decreased by 10%. The net change in the number is:

Answer: C

Let the original number be 100.

After a 10% increase, the number becomes 110.

Now, decrease this new number by 10%. The decrease is 10% of 110, which is 11.

The final number is 110 - 11 = 99.

The net change from the original number (100) is a decrease of 1, which is a 1% decrease.

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