-68.88% is the change from 800 to 249
Calculation steps:
[( 249 - 800 ) ÷ 800] x 100 = -68.88%
Formula
Percentage change = [(249 - 800) / 800] x 100
Subtract the new number by the original number
249 - 800 = -551
-551 ÷ 800 = -0.68875
-0.68875 x 100 = -68.88%