-33.81% is the change from 485 to 321
Calculation steps:
[( 321 - 485 ) ÷ 485] x 100 = -33.81%
Formula
Percentage change = [(321 - 485) / 485] x 100
Subtract the new number by the original number
321 - 485 = -164
-164 ÷ 485 = -0.33814432989690724
-0.33814432989690724 x 100 = -33.81%