-12.93% is the change from 518 to 451
Calculation steps:
[( 451 - 518 ) ÷ 518] x 100 = -12.93%
Formula
Percentage change = [(451 - 518) / 518] x 100
Subtract the new number by the original number
451 - 518 = -67
-67 ÷ 518 = -0.12934362934362933
-0.12934362934362933 x 100 = -12.93%