-97.67% is the change from 860 to 20
Calculation steps:
[( 20 - 860 ) ÷ 860] x 100 = -97.67%
Formula
Percentage change = [(20 - 860) / 860] x 100
Subtract the new number by the original number
20 - 860 = -840
-840 ÷ 860 = -0.9767441860465116
-0.9767441860465116 x 100 = -97.67%