-90.2% is the change from 806 to 79
Calculation steps:
[( 79 - 806 ) ÷ 806] x 100 = -90.2%
Formula
Percentage change = [(79 - 806) / 806] x 100
Subtract the new number by the original number
79 - 806 = -727
-727 ÷ 806 = -0.901985111662531
-0.901985111662531 x 100 = -90.2%