-89.87% is the change from 849 to 86
Calculation steps:
[( 86 - 849 ) ÷ 849] x 100 = -89.87%
Formula
Percentage change = [(86 - 849) / 849] x 100
Subtract the new number by the original number
86 - 849 = -763
-763 ÷ 849 = -0.8987043580683156
-0.8987043580683156 x 100 = -89.87%