-86.99% is the change from 838 to 109
Calculation steps:
[( 109 - 838 ) ÷ 838] x 100 = -86.99%
Formula
Percentage change = [(109 - 838) / 838] x 100
Subtract the new number by the original number
109 - 838 = -729
-729 ÷ 838 = -0.869928400954654
-0.869928400954654 x 100 = -86.99%