42.89% is the change from 450 to 643
Calculation steps:
[( 643 - 450 ) ÷ 450] x 100 = 42.89%
Formula
Percentage change = [(643 - 450) / 450] x 100
Subtract the new number by the original number
643 - 450 = 193
193 ÷ 450 = 0.4288888888888889
0.4288888888888889 x 100 = 42.89%