-82.64% is the change from 985 to 171
Calculation steps:
[( 171 - 985 ) ÷ 985] x 100 = -82.64%
Formula
Percentage change = [(171 - 985) / 985] x 100
Subtract the new number by the original number
171 - 985 = -814
-814 ÷ 985 = -0.8263959390862944
-0.8263959390862944 x 100 = -82.64%