13.56% is the change from 450 to 511
Calculation steps:
[( 511 - 450 ) ÷ 450] x 100 = 13.56%
Formula
Percentage change = [(511 - 450) / 450] x 100
Subtract the new number by the original number
511 - 450 = 61
61 ÷ 450 = 0.13555555555555557
0.13555555555555557 x 100 = 13.56%