80% is the change from 80 to 144
Calculation steps:
[( 144 - 80 ) ÷ 80] x 100 = 80%
Formula
Percentage change = [(144 - 80) / 80] x 100
Subtract the new number by the original number
144 - 80 = 64
64 ÷ 80 = 0.8
0.8 x 100 = 80%
Example