-35.98% is the change from 656 to 420
Calculation steps:
[( 420 - 656 ) ÷ 656] x 100 = -35.98%
Formula
Percentage change = [(420 - 656) / 656] x 100
Subtract the new number by the original number
420 - 656 = -236
-236 ÷ 656 = -0.3597560975609756
-0.3597560975609756 x 100 = -35.98%