300.49% is the change from 204 to 817
Calculation steps:
[( 817 - 204 ) ÷ 204] x 100 = 300.49%
Formula
Percentage change = [(817 - 204) / 204] x 100
Subtract the new number by the original number
817 - 204 = 613
613 ÷ 204 = 3.0049019607843137
3.0049019607843137 x 100 = 300.49%