310.05% is the change from 199 to 816
Calculation steps:
[( 816 - 199 ) ÷ 199] x 100 = 310.05%
Formula
Percentage change = [(816 - 199) / 199] x 100
Subtract the new number by the original number
816 - 199 = 617
617 ÷ 199 = 3.100502512562814
3.100502512562814 x 100 = 310.05%