83.86% is the change from 440 to 809
Calculation steps:
[( 809 - 440 ) ÷ 440] x 100 = 83.86%
Formula
Percentage change = [(809 - 440) / 440] x 100
Subtract the new number by the original number
809 - 440 = 369
369 ÷ 440 = 0.8386363636363636
0.8386363636363636 x 100 = 83.86%