-90.38% is the change from 800 to 77
Calculation steps:
[( 77 - 800 ) ÷ 800] x 100 = -90.38%
Formula
Percentage change = [(77 - 800) / 800] x 100
Subtract the new number by the original number
77 - 800 = -723
-723 ÷ 800 = -0.90375
-0.90375 x 100 = -90.38%