-83.71% is the change from 847 to 138
Calculation steps:
[( 138 - 847 ) ÷ 847] x 100 = -83.71%
Formula
Percentage change = [(138 - 847) / 847] x 100
Subtract the new number by the original number
138 - 847 = -709
-709 ÷ 847 = -0.8370720188902007
-0.8370720188902007 x 100 = -83.71%