50.5% is the change from 299 to 450
Calculation steps:
[( 450 - 299 ) ÷ 299] x 100 = 50.5%
Formula
Percentage change = [(450 - 299) / 299] x 100
Subtract the new number by the original number
450 - 299 = 151
151 ÷ 299 = 0.5050167224080268
0.5050167224080268 x 100 = 50.5%