121.51% is the change from 451 to 999
Calculation steps:
[( 999 - 451 ) ÷ 451] x 100 = 121.51%
Formula
Percentage change = [(999 - 451) / 451] x 100
Subtract the new number by the original number
999 - 451 = 548
548 ÷ 451 = 1.2150776053215078
1.2150776053215078 x 100 = 121.51%