13.78% is the change from 450 to 512
Calculation steps:
[( 512 - 450 ) ÷ 450] x 100 = 13.78%
Formula
Percentage change = [(512 - 450) / 450] x 100
Subtract the new number by the original number
512 - 450 = 62
62 ÷ 450 = 0.13777777777777778
0.13777777777777778 x 100 = 13.78%