188.93% is the change from 280 to 809
Calculation steps:
[( 809 - 280 ) ÷ 280] x 100 = 188.93%
Formula
Percentage change = [(809 - 280) / 280] x 100
Subtract the new number by the original number
809 - 280 = 529
529 ÷ 280 = 1.8892857142857142
1.8892857142857142 x 100 = 188.93%