1223.53% is the change from 34 to 450
Calculation steps:
[( 450 - 34 ) ÷ 34] x 100 = 1223.53%
Formula
Percentage change = [(450 - 34) / 34] x 100
Subtract the new number by the original number
450 - 34 = 416
416 ÷ 34 = 12.235294117647058
12.235294117647058 x 100 = 1223.53%