-48.91% is the change from 321 to 164
Calculation steps:
[( 164 - 321 ) ÷ 321] x 100 = -48.91%
Formula
Percentage change = [(164 - 321) / 321] x 100
Subtract the new number by the original number
164 - 321 = -157
-157 ÷ 321 = -0.48909657320872274
-0.48909657320872274 x 100 = -48.91%