312.56% is the change from 199 to 821
Calculation steps:
[( 821 - 199 ) ÷ 199] x 100 = 312.56%
Formula
Percentage change = [(821 - 199) / 199] x 100
Subtract the new number by the original number
821 - 199 = 622
622 ÷ 199 = 3.1256281407035176
3.1256281407035176 x 100 = 312.56%