104.01% is the change from 399 to 814
Calculation steps:
[( 814 - 399 ) ÷ 399] x 100 = 104.01%
Formula
Percentage change = [(814 - 399) / 399] x 100
Subtract the new number by the original number
814 - 399 = 415
415 ÷ 399 = 1.0401002506265664
1.0401002506265664 x 100 = 104.01%