-43.63% is the change from 800 to 451
Calculation steps:
[( 451 - 800 ) ÷ 800] x 100 = -43.63%
Formula
Percentage change = [(451 - 800) / 800] x 100
Subtract the new number by the original number
451 - 800 = -349
-349 ÷ 800 = -0.43625
-0.43625 x 100 = -43.63%