-60.82% is the change from 656 to 257
Calculation steps:
[( 257 - 656 ) ÷ 656] x 100 = -60.82%
Formula
Percentage change = [(257 - 656) / 656] x 100
Subtract the new number by the original number
257 - 656 = -399
-399 ÷ 656 = -0.6082317073170732
-0.6082317073170732 x 100 = -60.82%