-60.88% is the change from 657 to 257
Calculation steps:
[( 257 - 657 ) ÷ 657] x 100 = -60.88%
Formula
Percentage change = [(257 - 657) / 657] x 100
Subtract the new number by the original number
257 - 657 = -400
-400 ÷ 657 = -0.60882800608828
-0.60882800608828 x 100 = -60.88%