84.69% is the change from 320 to 591
Calculation steps:
[( 591 - 320 ) ÷ 320] x 100 = 84.69%
Formula
Percentage change = [(591 - 320) / 320] x 100
Subtract the new number by the original number
591 - 320 = 271
271 ÷ 320 = 0.846875
0.846875 x 100 = 84.69%