-89.42% is the change from 813 to 86
Calculation steps:
[( 86 - 813 ) ÷ 813] x 100 = -89.42%
Formula
Percentage change = [(86 - 813) / 813] x 100
Subtract the new number by the original number
86 - 813 = -727
-727 ÷ 813 = -0.8942189421894219
-0.8942189421894219 x 100 = -89.42%