68.71% is the change from 310 to 523
Calculation steps:
[( 523 - 310 ) ÷ 310] x 100 = 68.71%
Formula
Percentage change = [(523 - 310) / 310] x 100
Subtract the new number by the original number
523 - 310 = 213
213 ÷ 310 = 0.6870967741935484
0.6870967741935484 x 100 = 68.71%