-55.14% is the change from 321 to 144
Calculation steps:
[( 144 - 321 ) ÷ 321] x 100 = -55.14%
Formula
Percentage change = [(144 - 321) / 321] x 100
Subtract the new number by the original number
144 - 321 = -177
-177 ÷ 321 = -0.5514018691588785
-0.5514018691588785 x 100 = -55.14%