-11.74% is the change from 511 to 451
Calculation steps:
[( 451 - 511 ) ÷ 511] x 100 = -11.74%
Formula
Percentage change = [(451 - 511) / 511] x 100
Subtract the new number by the original number
451 - 511 = -60
-60 ÷ 511 = -0.11741682974559686
-0.11741682974559686 x 100 = -11.74%