329.84% is the change from 191 to 821
Calculation steps:
[( 821 - 191 ) ÷ 191] x 100 = 329.84%
Formula
Percentage change = [(821 - 191) / 191] x 100
Subtract the new number by the original number
821 - 191 = 630
630 ÷ 191 = 3.298429319371728
3.298429319371728 x 100 = 329.84%