-55.76% is the change from 321 to 142
Calculation steps:
[( 142 - 321 ) ÷ 321] x 100 = -55.76%
Formula
Percentage change = [(142 - 321) / 321] x 100
Subtract the new number by the original number
142 - 321 = -179
-179 ÷ 321 = -0.557632398753894
-0.557632398753894 x 100 = -55.76%