34.74% is the change from 616 to 830
Calculation steps:
[( 830 - 616 ) ÷ 616] x 100 = 34.74%
Formula
Percentage change = [(830 - 616) / 616] x 100
Subtract the new number by the original number
830 - 616 = 214
214 ÷ 616 = 0.3474025974025974
0.3474025974025974 x 100 = 34.74%