40.18% is the change from 657 to 921
Calculation steps:
[( 921 - 657 ) ÷ 657] x 100 = 40.18%
Formula
Percentage change = [(921 - 657) / 657] x 100
Subtract the new number by the original number
921 - 657 = 264
264 ÷ 657 = 0.4018264840182648
0.4018264840182648 x 100 = 40.18%