80% is the change from 180 to 324
Calculation steps:
[( 324 - 180 ) ÷ 180] x 100 = 80%
Formula
Percentage change = [(324 - 180) / 180] x 100
Subtract the new number by the original number
324 - 180 = 144
144 ÷ 180 = 0.8
0.8 x 100 = 80%
Example