-61.19% is the change from 657 to 255
Calculation steps:
[( 255 - 657 ) ÷ 657] x 100 = -61.19%
Formula
Percentage change = [(255 - 657) / 657] x 100
Subtract the new number by the original number
255 - 657 = -402
-402 ÷ 657 = -0.6118721461187214
-0.6118721461187214 x 100 = -61.19%