109.07% is the change from 397 to 830
Calculation steps:
[( 830 - 397 ) ÷ 397] x 100 = 109.07%
Formula
Percentage change = [(830 - 397) / 397] x 100
Subtract the new number by the original number
830 - 397 = 433
433 ÷ 397 = 1.0906801007556675
1.0906801007556675 x 100 = 109.07%