-65.63% is the change from 800 to 275
Calculation steps:
[( 275 - 800 ) ÷ 800] x 100 = -65.63%
Formula
Percentage change = [(275 - 800) / 800] x 100
Subtract the new number by the original number
275 - 800 = -525
-525 ÷ 800 = -0.65625
-0.65625 x 100 = -65.63%