-54.21% is the change from 321 to 147
Calculation steps:
[( 147 - 321 ) ÷ 321] x 100 = -54.21%
Formula
Percentage change = [(147 - 321) / 321] x 100
Subtract the new number by the original number
147 - 321 = -174
-174 ÷ 321 = -0.5420560747663551
-0.5420560747663551 x 100 = -54.21%