99.78% is the change from 451 to 901
Calculation steps:
[( 901 - 451 ) ÷ 451] x 100 = 99.78%
Formula
Percentage change = [(901 - 451) / 451] x 100
Subtract the new number by the original number
901 - 451 = 450
450 ÷ 451 = 0.9977827050997783
0.9977827050997783 x 100 = 99.78%