-50.88% is the change from 800 to 393
Calculation steps:
[( 393 - 800 ) ÷ 800] x 100 = -50.88%
Formula
Percentage change = [(393 - 800) / 800] x 100
Subtract the new number by the original number
393 - 800 = -407
-407 ÷ 800 = -0.50875
-0.50875 x 100 = -50.88%