150% is the change from 80 to 200
Calculation steps:
[( 200 - 80 ) ÷ 80] x 100 = 150%
Formula
Percentage change = [(200 - 80) / 80] x 100
Subtract the new number by the original number
200 - 80 = 120
120 ÷ 80 = 1.5
1.5 x 100 = 150%
Example