-81.63% is the change from 849 to 156
Calculation steps:
[( 156 - 849 ) ÷ 849] x 100 = -81.63%
Formula
Percentage change = [(156 - 849) / 849] x 100
Subtract the new number by the original number
156 - 849 = -693
-693 ÷ 849 = -0.8162544169611308
-0.8162544169611308 x 100 = -81.63%