38.33% is the change from 600 to 830
Calculation steps:
[( 830 - 600 ) ÷ 600] x 100 = 38.33%
Formula
Percentage change = [(830 - 600) / 600] x 100
Subtract the new number by the original number
830 - 600 = 230
230 ÷ 600 = 0.38333333333333336
0.38333333333333336 x 100 = 38.33%