51.78% is the change from 450 to 683
Calculation steps:
[( 683 - 450 ) ÷ 450] x 100 = 51.78%
Formula
Percentage change = [(683 - 450) / 450] x 100
Subtract the new number by the original number
683 - 450 = 233
233 ÷ 450 = 0.5177777777777778
0.5177777777777778 x 100 = 51.78%