-90.5% is the change from 800 to 76
Calculation steps:
[( 76 - 800 ) ÷ 800] x 100 = -90.5%
Formula
Percentage change = [(76 - 800) / 800] x 100
Subtract the new number by the original number
76 - 800 = -724
-724 ÷ 800 = -0.905
-0.905 x 100 = -90.5%
Example