387.35% is the change from 166 to 809
Calculation steps:
[( 809 - 166 ) ÷ 166] x 100 = 387.35%
Formula
Percentage change = [(809 - 166) / 166] x 100
Subtract the new number by the original number
809 - 166 = 643
643 ÷ 166 = 3.8734939759036147
3.8734939759036147 x 100 = 387.35%