-90.25% is the change from 800 to 78
Calculation steps:
[( 78 - 800 ) ÷ 800] x 100 = -90.25%
Formula
Percentage change = [(78 - 800) / 800] x 100
Subtract the new number by the original number
78 - 800 = -722
-722 ÷ 800 = -0.9025
-0.9025 x 100 = -90.25%