-83.89% is the change from 863 to 139
Calculation steps:
[( 139 - 863 ) ÷ 863] x 100 = -83.89%
Formula
Percentage change = [(139 - 863) / 863] x 100
Subtract the new number by the original number
139 - 863 = -724
-724 ÷ 863 = -0.8389339513325609
-0.8389339513325609 x 100 = -83.89%