A number is increased by 20% and then it is decreased by

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A number is increased by 20% and then it is decreased by 10%. Find the net increase or decrease per cent.

1. 10% increase
2. 10% decrease
3. 8% increase
4. 8% decrease

Correct Option: C

Using Rule 4,
Net % change

=		A + B +	AB		%
			100

Here, A = 20%, B = – 10%
∴ Net % change

20 - 10 -	200
	100

= 10 – 2= 8%
+ ve sign shows increase