3.88% is the change from 799 to 830
Calculation steps:
[( 830 - 799 ) ÷ 799] x 100 = 3.88%
Formula
Percentage change = [(830 - 799) / 799] x 100
Subtract the new number by the original number
830 - 799 = 31
31 ÷ 799 = 0.03879849812265332
0.03879849812265332 x 100 = 3.88%