-47.25% is the change from 800 to 422
Calculation steps:
[( 422 - 800 ) ÷ 800] x 100 = -47.25%
Formula
Percentage change = [(422 - 800) / 800] x 100
Subtract the new number by the original number
422 - 800 = -378
-378 ÷ 800 = -0.4725
-0.4725 x 100 = -47.25%