84.4% is the change from 455 to 839
Calculation steps:
[( 839 - 455 ) ÷ 455] x 100 = 84.4%
Formula
Percentage change = [(839 - 455) / 455] x 100
Subtract the new number by the original number
839 - 455 = 384
384 ÷ 455 = 0.843956043956044
0.843956043956044 x 100 = 84.4%