84.11% is the change from 321 to 591
Calculation steps:
[( 591 - 321 ) ÷ 321] x 100 = 84.11%
Formula
Percentage change = [(591 - 321) / 321] x 100
Subtract the new number by the original number
591 - 321 = 270
270 ÷ 321 = 0.8411214953271028
0.8411214953271028 x 100 = 84.11%