50.89% is the change from 450 to 679
Calculation steps:
[( 679 - 450 ) ÷ 450] x 100 = 50.89%
Formula
Percentage change = [(679 - 450) / 450] x 100
Subtract the new number by the original number
679 - 450 = 229
229 ÷ 450 = 0.5088888888888888
0.5088888888888888 x 100 = 50.89%