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.