-82.35% is the change from 680 to 120
Calculation steps:
[( 120 - 680 ) ÷ 680] x 100 = -82.35%
Formula
Percentage change = [(120 - 680) / 680] x 100
Subtract the new number by the original number
120 - 680 = -560
-560 ÷ 680 = -0.8235294117647058
-0.8235294117647058 x 100 = -82.35%