-50.63% is the change from 800 to 395
Calculation steps:
[( 395 - 800 ) ÷ 800] x 100 = -50.63%
Formula
Percentage change = [(395 - 800) / 800] x 100
Subtract the new number by the original number
395 - 800 = -405
-405 ÷ 800 = -0.50625
-0.50625 x 100 = -50.63%