Question

a number is first increased by 20% and later decreased by 20% find the overall change​

Answer 1

Answer:

Let the number be =100

Increase in the number =20% of 100

= 20/100×100

=20

Increased number =100+20

=120

The resulting number decreased by 20%

Decrease in the number = 20/120×120

=24

New number =120−24

=96

Now, net decrease =100−96

Net % decrease = Net decrease/Original number

=4/100×100

=4%

Hence the net percent decrease is 4%.