107.82% is the change from 409 to 850
Calculation steps:
[( 850 - 409 ) ÷ 409] x 100 = 107.82%
Formula
Percentage change = [(850 - 409) / 409] x 100
Subtract the new number by the original number
850 - 409 = 441
441 ÷ 409 = 1.078239608801956
1.078239608801956 x 100 = 107.82%