-96.5% is the change from 800 to 28
Calculation steps:
[( 28 - 800 ) ÷ 800] x 100 = -96.5%
Formula
Percentage change = [(28 - 800) / 800] x 100
Subtract the new number by the original number
28 - 800 = -772
-772 ÷ 800 = -0.965
-0.965 x 100 = -96.5%
Example