-43% is the change from 800 to 456
Calculation steps:
[( 456 - 800 ) ÷ 800] x 100 = -43%
Formula
Percentage change = [(456 - 800) / 800] x 100
Subtract the new number by the original number
456 - 800 = -344
-344 ÷ 800 = -0.43
-0.43 x 100 = -43%
Example