-65.13% is the change from 800 to 279
Calculation steps:
[( 279 - 800 ) ÷ 800] x 100 = -65.13%
Formula
Percentage change = [(279 - 800) / 800] x 100
Subtract the new number by the original number
279 - 800 = -521
-521 ÷ 800 = -0.65125
-0.65125 x 100 = -65.13%