20% is the change from 660 to 792
Calculation steps:
[( 792 - 660 ) ÷ 660] x 100 = 20%
Formula
Percentage change = [(792 - 660) / 660] x 100
Subtract the new number by the original number
792 - 660 = 132
132 ÷ 660 = 0.2
0.2 x 100 = 20%
Example