-83.51% is the change from 843 to 139
Calculation steps:
[( 139 - 843 ) ÷ 843] x 100 = -83.51%
Formula
Percentage change = [(139 - 843) / 843] x 100
Subtract the new number by the original number
139 - 843 = -704
-704 ÷ 843 = -0.8351126927639383
-0.8351126927639383 x 100 = -83.51%