-79.72% is the change from 853 to 173
Calculation steps:
[( 173 - 853 ) ÷ 853] x 100 = -79.72%
Formula
Percentage change = [(173 - 853) / 853] x 100
Subtract the new number by the original number
173 - 853 = -680
-680 ÷ 853 = -0.7971864009378663
-0.7971864009378663 x 100 = -79.72%