-91.55% is the change from 663 to 56
Calculation steps:
[( 56 - 663 ) ÷ 663] x 100 = -91.55%
Formula
Percentage change = [(56 - 663) / 663] x 100
Subtract the new number by the original number
56 - 663 = -607
-607 ÷ 663 = -0.9155354449472096
-0.9155354449472096 x 100 = -91.55%