The percentage change in a number when it is first decreased

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The percentage change in a number when it is first decreased by 10% and then increased by 10% is

1. 0.1 % increase
2. 1 % decrease
3. 0.1 % decrease
4. No changes

Correct Option: B

Here , y = 10%
Using the given formula ,

Required percent = -	y²	%
	100

Required percent = -	10 × 10	= –1%
	100

Negative sign shows decrease.