90.03% is the change from 311 to 591
Calculation steps:
[( 591 - 311 ) ÷ 311] x 100 = 90.03%
Formula
Percentage change = [(591 - 311) / 311] x 100
Subtract the new number by the original number
591 - 311 = 280
280 ÷ 311 = 0.9003215434083601
0.9003215434083601 x 100 = 90.03%