-89.99% is the change from 859 to 86
Calculation steps:
[( 86 - 859 ) ÷ 859] x 100 = -89.99%
Formula
Percentage change = [(86 - 859) / 859] x 100
Subtract the new number by the original number
86 - 859 = -773
-773 ÷ 859 = -0.89988358556461
-0.89988358556461 x 100 = -89.99%