68.39% is the change from 310 to 522
Calculation steps:
[( 522 - 310 ) ÷ 310] x 100 = 68.39%
Formula
Percentage change = [(522 - 310) / 310] x 100
Subtract the new number by the original number
522 - 310 = 212
212 ÷ 310 = 0.6838709677419355
0.6838709677419355 x 100 = 68.39%