-89.74% is the change from 838 to 86
Calculation steps:
[( 86 - 838 ) ÷ 838] x 100 = -89.74%
Formula
Percentage change = [(86 - 838) / 838] x 100
Subtract the new number by the original number
86 - 838 = -752
-752 ÷ 838 = -0.8973747016706444
-0.8973747016706444 x 100 = -89.74%