-81.27% is the change from 849 to 159
Calculation steps:
[( 159 - 849 ) ÷ 849] x 100 = -81.27%
Formula
Percentage change = [(159 - 849) / 849] x 100
Subtract the new number by the original number
159 - 849 = -690
-690 ÷ 849 = -0.8127208480565371
-0.8127208480565371 x 100 = -81.27%