-46.73% is the change from 321 to 171
Calculation steps:
[( 171 - 321 ) ÷ 321] x 100 = -46.73%
Formula
Percentage change = [(171 - 321) / 321] x 100
Subtract the new number by the original number
171 - 321 = -150
-150 ÷ 321 = -0.4672897196261682
-0.4672897196261682 x 100 = -46.73%