-81.98% is the change from 860 to 155
Calculation steps:
[( 155 - 860 ) ÷ 860] x 100 = -81.98%
Formula
Percentage change = [(155 - 860) / 860] x 100
Subtract the new number by the original number
155 - 860 = -705
-705 ÷ 860 = -0.8197674418604651
-0.8197674418604651 x 100 = -81.98%