-93.82% is the change from 680 to 42
Calculation steps:
[( 42 - 680 ) ÷ 680] x 100 = -93.82%
Formula
Percentage change = [(42 - 680) / 680] x 100
Subtract the new number by the original number
42 - 680 = -638
-638 ÷ 680 = -0.9382352941176471
-0.9382352941176471 x 100 = -93.82%