104.76% is the change from 399 to 817
Calculation steps:
[( 817 - 399 ) ÷ 399] x 100 = 104.76%
Formula
Percentage change = [(817 - 399) / 399] x 100
Subtract the new number by the original number
817 - 399 = 418
418 ÷ 399 = 1.0476190476190477
1.0476190476190477 x 100 = 104.76%