-21.31% is the change from 657 to 517
Calculation steps:
[( 517 - 657 ) ÷ 657] x 100 = -21.31%
Formula
Percentage change = [(517 - 657) / 657] x 100
Subtract the new number by the original number
517 - 657 = -140
-140 ÷ 657 = -0.213089802130898
-0.213089802130898 x 100 = -21.31%