67.42% is the change from 310 to 519
Calculation steps:
[( 519 - 310 ) ÷ 310] x 100 = 67.42%
Formula
Percentage change = [(519 - 310) / 310] x 100
Subtract the new number by the original number
519 - 310 = 209
209 ÷ 310 = 0.6741935483870968
0.6741935483870968 x 100 = 67.42%