423.04% is the change from 191 to 999
Calculation steps:
[( 999 - 191 ) ÷ 191] x 100 = 423.04%
Formula
Percentage change = [(999 - 191) / 191] x 100
Subtract the new number by the original number
999 - 191 = 808
808 ÷ 191 = 4.230366492146596
4.230366492146596 x 100 = 423.04%