65.49% is the change from 397 to 657
Calculation steps:
[( 657 - 397 ) ÷ 397] x 100 = 65.49%
Formula
Percentage change = [(657 - 397) / 397] x 100
Subtract the new number by the original number
657 - 397 = 260
260 ÷ 397 = 0.654911838790932
0.654911838790932 x 100 = 65.49%