-91.76% is the change from 680 to 56
Calculation steps:
[( 56 - 680 ) ÷ 680] x 100 = -91.76%
Formula
Percentage change = [(56 - 680) / 680] x 100
Subtract the new number by the original number
56 - 680 = -624
-624 ÷ 680 = -0.9176470588235294
-0.9176470588235294 x 100 = -91.76%