97.74% is the change from 310 to 613
Calculation steps:
[( 613 - 310 ) ÷ 310] x 100 = 97.74%
Formula
Percentage change = [(613 - 310) / 310] x 100
Subtract the new number by the original number
613 - 310 = 303
303 ÷ 310 = 0.9774193548387097
0.9774193548387097 x 100 = 97.74%