308.59% is the change from 198 to 809
Calculation steps:
[( 809 - 198 ) ÷ 198] x 100 = 308.59%
Formula
Percentage change = [(809 - 198) / 198] x 100
Subtract the new number by the original number
809 - 198 = 611
611 ÷ 198 = 3.085858585858586
3.085858585858586 x 100 = 308.59%