421.94% is the change from 155 to 809
Calculation steps:
[( 809 - 155 ) ÷ 155] x 100 = 421.94%
Formula
Percentage change = [(809 - 155) / 155] x 100
Subtract the new number by the original number
809 - 155 = 654
654 ÷ 155 = 4.219354838709678
4.219354838709678 x 100 = 421.94%