60% is the change from 80 to 128
Calculation steps:
[( 128 - 80 ) ÷ 80] x 100 = 60%
Formula
Percentage change = [(128 - 80) / 80] x 100
Subtract the new number by the original number
128 - 80 = 48
48 ÷ 80 = 0.6
0.6 x 100 = 60%
Example