509.15% is the change from 164 to 999
Calculation steps:
[( 999 - 164 ) ÷ 164] x 100 = 509.15%
Formula
Percentage change = [(999 - 164) / 164] x 100
Subtract the new number by the original number
999 - 164 = 835
835 ÷ 164 = 5.091463414634147
5.091463414634147 x 100 = 509.15%