-97% is the change from 800 to 24
Calculation steps:
[( 24 - 800 ) ÷ 800] x 100 = -97%
Formula
Percentage change = [(24 - 800) / 800] x 100
Subtract the new number by the original number
24 - 800 = -776
-776 ÷ 800 = -0.97
-0.97 x 100 = -97%
Example