-84.3% is the change from 860 to 135
Calculation steps:
[( 135 - 860 ) ÷ 860] x 100 = -84.3%
Formula
Percentage change = [(135 - 860) / 860] x 100
Subtract the new number by the original number
135 - 860 = -725
-725 ÷ 860 = -0.8430232558139535
-0.8430232558139535 x 100 = -84.3%