-79.06% is the change from 812 to 170
Calculation steps:
[( 170 - 812 ) ÷ 812] x 100 = -79.06%
Formula
Percentage change = [(170 - 812) / 812] x 100
Subtract the new number by the original number
170 - 812 = -642
-642 ÷ 812 = -0.7906403940886699
-0.7906403940886699 x 100 = -79.06%