-89.81% is the change from 844 to 86
Calculation steps:
[( 86 - 844 ) ÷ 844] x 100 = -89.81%
Formula
Percentage change = [(86 - 844) / 844] x 100
Subtract the new number by the original number
86 - 844 = -758
-758 ÷ 844 = -0.8981042654028436
-0.8981042654028436 x 100 = -89.81%