-80.26% is the change from 861 to 170
Calculation steps:
[( 170 - 861 ) ÷ 861] x 100 = -80.26%
Formula
Percentage change = [(170 - 861) / 861] x 100
Subtract the new number by the original number
170 - 861 = -691
-691 ÷ 861 = -0.8025551684088269
-0.8025551684088269 x 100 = -80.26%