-11.05% is the change from 507 to 451
Calculation steps:
[( 451 - 507 ) ÷ 507] x 100 = -11.05%
Formula
Percentage change = [(451 - 507) / 507] x 100
Subtract the new number by the original number
451 - 507 = -56
-56 ÷ 507 = -0.11045364891518737
-0.11045364891518737 x 100 = -11.05%