-27.63% is the change from 800 to 579
Calculation steps:
[( 579 - 800 ) ÷ 800] x 100 = -27.63%
Formula
Percentage change = [(579 - 800) / 800] x 100
Subtract the new number by the original number
579 - 800 = -221
-221 ÷ 800 = -0.27625
-0.27625 x 100 = -27.63%