-83.06% is the change from 980 to 166
Calculation steps:
[( 166 - 980 ) ÷ 980] x 100 = -83.06%
Formula
Percentage change = [(166 - 980) / 980] x 100
Subtract the new number by the original number
166 - 980 = -814
-814 ÷ 980 = -0.8306122448979592
-0.8306122448979592 x 100 = -83.06%