17.2% is the change from 657 to 770
Calculation steps:
[( 770 - 657 ) ÷ 657] x 100 = 17.2%
Formula
Percentage change = [(770 - 657) / 657] x 100
Subtract the new number by the original number
770 - 657 = 113
113 ÷ 657 = 0.1719939117199391
0.1719939117199391 x 100 = 17.2%