60.97% is the change from 310 to 499
Calculation steps:
[( 499 - 310 ) ÷ 310] x 100 = 60.97%
Formula
Percentage change = [(499 - 310) / 310] x 100
Subtract the new number by the original number
499 - 310 = 189
189 ÷ 310 = 0.6096774193548387
0.6096774193548387 x 100 = 60.97%