-83.19% is the change from 827 to 139
Calculation steps:
[( 139 - 827 ) ÷ 827] x 100 = -83.19%
Formula
Percentage change = [(139 - 827) / 827] x 100
Subtract the new number by the original number
139 - 827 = -688
-688 ÷ 827 = -0.8319226118500604
-0.8319226118500604 x 100 = -83.19%