-20.93% is the change from 860 to 680
Calculation steps:
[( 680 - 860 ) ÷ 860] x 100 = -20.93%
Formula
Percentage change = [(680 - 860) / 860] x 100
Subtract the new number by the original number
680 - 860 = -180
-180 ÷ 860 = -0.20930232558139536
-0.20930232558139536 x 100 = -20.93%