-98.88% is the change from 807 to 9
Calculation steps:
[( 9 - 807 ) ÷ 807] x 100 = -98.88%
Formula
Percentage change = [(9 - 807) / 807] x 100
Subtract the new number by the original number
9 - 807 = -798
-798 ÷ 807 = -0.9888475836431226
-0.9888475836431226 x 100 = -98.88%