24.81% is the change from 665 to 830
Calculation steps:
[( 830 - 665 ) ÷ 665] x 100 = 24.81%
Formula
Percentage change = [(830 - 665) / 665] x 100
Subtract the new number by the original number
830 - 665 = 165
165 ÷ 665 = 0.24812030075187969
0.24812030075187969 x 100 = 24.81%