-47.96% is the change from 319 to 166
Calculation steps:
[( 166 - 319 ) ÷ 319] x 100 = -47.96%
Formula
Percentage change = [(166 - 319) / 319] x 100
Subtract the new number by the original number
166 - 319 = -153
-153 ÷ 319 = -0.47962382445141066
-0.47962382445141066 x 100 = -47.96%