-54.37% is the change from 320 to 146
Calculation steps:
[( 146 - 320 ) ÷ 320] x 100 = -54.37%
Formula
Percentage change = [(146 - 320) / 320] x 100
Subtract the new number by the original number
146 - 320 = -174
-174 ÷ 320 = -0.54375
-0.54375 x 100 = -54.37%