309.6% is the change from 198 to 811
Calculation steps:
[( 811 - 198 ) ÷ 198] x 100 = 309.6%
Formula
Percentage change = [(811 - 198) / 198] x 100
Subtract the new number by the original number
811 - 198 = 613
613 ÷ 198 = 3.095959595959596
3.095959595959596 x 100 = 309.6%