31.4% is the change from 500 to 657
Calculation steps:
[( 657 - 500 ) ÷ 500] x 100 = 31.4%
Formula
Percentage change = [(657 - 500) / 500] x 100
Subtract the new number by the original number
657 - 500 = 157
157 ÷ 500 = 0.314
0.314 x 100 = 31.4%
Example