108.4% is the change from 405 to 844
Calculation steps:
[( 844 - 405 ) ÷ 405] x 100 = 108.4%
Formula
Percentage change = [(844 - 405) / 405] x 100
Subtract the new number by the original number
844 - 405 = 439
439 ÷ 405 = 1.0839506172839506
1.0839506172839506 x 100 = 108.4%