-90.74% is the change from 680 to 63
Calculation steps:
[( 63 - 680 ) ÷ 680] x 100 = -90.74%
Formula
Percentage change = [(63 - 680) / 680] x 100
Subtract the new number by the original number
63 - 680 = -617
-617 ÷ 680 = -0.9073529411764706
-0.9073529411764706 x 100 = -90.74%