28.57% is the change from 350 to 450
Calculation steps:
[( 450 - 350 ) ÷ 350] x 100 = 28.57%
Formula
Percentage change = [(450 - 350) / 350] x 100
Subtract the new number by the original number
450 - 350 = 100
100 ÷ 350 = 0.2857142857142857
0.2857142857142857 x 100 = 28.57%