58.39% is the change from 310 to 491
Calculation steps:
[( 491 - 310 ) ÷ 310] x 100 = 58.39%
Formula
Percentage change = [(491 - 310) / 310] x 100
Subtract the new number by the original number
491 - 310 = 181
181 ÷ 310 = 0.5838709677419355
0.5838709677419355 x 100 = 58.39%