-79.98% is the change from 849 to 170
Calculation steps:
[( 170 - 849 ) ÷ 849] x 100 = -79.98%
Formula
Percentage change = [(170 - 849) / 849] x 100
Subtract the new number by the original number
170 - 849 = -679
-679 ÷ 849 = -0.7997644287396938
-0.7997644287396938 x 100 = -79.98%