-39.57% is the change from 657 to 397
Calculation steps:
[( 397 - 657 ) ÷ 657] x 100 = -39.57%
Formula
Percentage change = [(397 - 657) / 657] x 100
Subtract the new number by the original number
397 - 657 = -260
-260 ÷ 657 = -0.395738203957382
-0.395738203957382 x 100 = -39.57%