51.09% is the change from 321 to 485
Calculation steps:
[( 485 - 321 ) ÷ 321] x 100 = 51.09%
Formula
Percentage change = [(485 - 321) / 321] x 100
Subtract the new number by the original number
485 - 321 = 164
164 ÷ 321 = 0.5109034267912772
0.5109034267912772 x 100 = 51.09%