-50.16% is the change from 321 to 160
Calculation steps:
[( 160 - 321 ) ÷ 321] x 100 = -50.16%
Formula
Percentage change = [(160 - 321) / 321] x 100
Subtract the new number by the original number
160 - 321 = -161
-161 ÷ 321 = -0.5015576323987538
-0.5015576323987538 x 100 = -50.16%