A number is increased by 20% and the increased number is decreased by 20%. Find the increase or decrease percent.
Let x be the number.
Increase in the number =20% of x
The resulting number decreased by 20%
Decrease in the number =20% of 6x5
New number =6x5-6x25
The net decrease =x-24x25
Net % decrease =x25x×100
Hence, the net percent decrease =4%.