-88.69% is the change from 451 to 51
Calculation steps:
[( 51 - 451 ) ÷ 451] x 100 = -88.69%
Formula
Percentage change = [(51 - 451) / 451] x 100
Subtract the new number by the original number
51 - 451 = -400
-400 ÷ 451 = -0.8869179600886918
-0.8869179600886918 x 100 = -88.69%