-81.64% is the change from 904 to 166
Calculation steps:
[( 166 - 904 ) ÷ 904] x 100 = -81.64%
Formula
Percentage change = [(166 - 904) / 904] x 100
Subtract the new number by the original number
166 - 904 = -738
-738 ÷ 904 = -0.8163716814159292
-0.8163716814159292 x 100 = -81.64%