-79.98% is the change from 859 to 172
Calculation steps:
[( 172 - 859 ) ÷ 859] x 100 = -79.98%
Formula
Percentage change = [(172 - 859) / 859] x 100
Subtract the new number by the original number
172 - 859 = -687
-687 ÷ 859 = -0.79976717112922
-0.79976717112922 x 100 = -79.98%