-47% is the change from 800 to 424
Calculation steps:
[( 424 - 800 ) ÷ 800] x 100 = -47%
Formula
Percentage change = [(424 - 800) / 800] x 100
Subtract the new number by the original number
424 - 800 = -376
-376 ÷ 800 = -0.47
-0.47 x 100 = -47%
Example