-27% is the change from 800 to 584
Calculation steps:
[( 584 - 800 ) ÷ 800] x 100 = -27%
Formula
Percentage change = [(584 - 800) / 800] x 100
Subtract the new number by the original number
584 - 800 = -216
-216 ÷ 800 = -0.27
-0.27 x 100 = -27%
Example