90.65% is the change from 310 to 591
Calculation steps:
[( 591 - 310 ) ÷ 310] x 100 = 90.65%
Formula
Percentage change = [(591 - 310) / 310] x 100
Subtract the new number by the original number
591 - 310 = 281
281 ÷ 310 = 0.9064516129032258
0.9064516129032258 x 100 = 90.65%