30.95% is the change from 504 to 660
Calculation steps:
[( 660 - 504 ) ÷ 504] x 100 = 30.95%
Formula
Percentage change = [(660 - 504) / 504] x 100
Subtract the new number by the original number
660 - 504 = 156
156 ÷ 504 = 0.30952380952380953
0.30952380952380953 x 100 = 30.95%