87.42% is the change from 310 to 581
Calculation steps:
[( 581 - 310 ) ÷ 310] x 100 = 87.42%
Formula
Percentage change = [(581 - 310) / 310] x 100
Subtract the new number by the original number
581 - 310 = 271
271 ÷ 310 = 0.8741935483870967
0.8741935483870967 x 100 = 87.42%