309% is the change from 200 to 818
Calculation steps:
[( 818 - 200 ) ÷ 200] x 100 = 309%
Formula
Percentage change = [(818 - 200) / 200] x 100
Subtract the new number by the original number
818 - 200 = 618
618 ÷ 200 = 3.09
3.09 x 100 = 309%
Example