-91.5% is the change from 800 to 68
Calculation steps:
[( 68 - 800 ) ÷ 800] x 100 = -91.5%
Formula
Percentage change = [(68 - 800) / 800] x 100
Subtract the new number by the original number
68 - 800 = -732
-732 ÷ 800 = -0.915
-0.915 x 100 = -91.5%
Example