108.39% is the change from 310 to 646
Calculation steps:
[( 646 - 310 ) ÷ 310] x 100 = 108.39%
Formula
Percentage change = [(646 - 310) / 310] x 100
Subtract the new number by the original number
646 - 310 = 336
336 ÷ 310 = 1.0838709677419356
1.0838709677419356 x 100 = 108.39%