-83.13% is the change from 824 to 139
Calculation steps:
[( 139 - 824 ) ÷ 824] x 100 = -83.13%
Formula
Percentage change = [(139 - 824) / 824] x 100
Subtract the new number by the original number
139 - 824 = -685
-685 ÷ 824 = -0.8313106796116505
-0.8313106796116505 x 100 = -83.13%