-79.88% is the change from 845 to 170
Calculation steps:
[( 170 - 845 ) ÷ 845] x 100 = -79.88%
Formula
Percentage change = [(170 - 845) / 845] x 100
Subtract the new number by the original number
170 - 845 = -675
-675 ÷ 845 = -0.7988165680473372
-0.7988165680473372 x 100 = -79.88%