-81.51% is the change from 898 to 166
Calculation steps:
[( 166 - 898 ) ÷ 898] x 100 = -81.51%
Formula
Percentage change = [(166 - 898) / 898] x 100
Subtract the new number by the original number
166 - 898 = -732
-732 ÷ 898 = -0.8151447661469933
-0.8151447661469933 x 100 = -81.51%