-89.82% is the change from 845 to 86
Calculation steps:
[( 86 - 845 ) ÷ 845] x 100 = -89.82%
Formula
Percentage change = [(86 - 845) / 845] x 100
Subtract the new number by the original number
86 - 845 = -759
-759 ÷ 845 = -0.8982248520710059
-0.8982248520710059 x 100 = -89.82%