-56.25% is the change from 800 to 350
Calculation steps:
[( 350 - 800 ) ÷ 800] x 100 = -56.25%
Formula
Percentage change = [(350 - 800) / 800] x 100
Subtract the new number by the original number
350 - 800 = -450
-450 ÷ 800 = -0.5625
-0.5625 x 100 = -56.25%