110.28% is the change from 399 to 839
Calculation steps:
[( 839 - 399 ) ÷ 399] x 100 = 110.28%
Formula
Percentage change = [(839 - 399) / 399] x 100
Subtract the new number by the original number
839 - 399 = 440
440 ÷ 399 = 1.1027568922305764
1.1027568922305764 x 100 = 110.28%