38.8% is the change from 598 to 830
Calculation steps:
[( 830 - 598 ) ÷ 598] x 100 = 38.8%
Formula
Percentage change = [(830 - 598) / 598] x 100
Subtract the new number by the original number
830 - 598 = 232
232 ÷ 598 = 0.3879598662207358
0.3879598662207358 x 100 = 38.8%