-11.24% is the change from 507 to 450
Calculation steps:
[( 450 - 507 ) ÷ 507] x 100 = -11.24%
Formula
Percentage change = [(450 - 507) / 507] x 100
Subtract the new number by the original number
450 - 507 = -57
-57 ÷ 507 = -0.11242603550295859
-0.11242603550295859 x 100 = -11.24%