9.5% is the change from 600 to 657
Calculation steps:
[( 657 - 600 ) ÷ 600] x 100 = 9.5%
Formula
Percentage change = [(657 - 600) / 600] x 100
Subtract the new number by the original number
657 - 600 = 57
57 ÷ 600 = 0.095
0.095 x 100 = 9.5%
Example