-99% is the change from 803 to 8
Calculation steps:
[( 8 - 803 ) ÷ 803] x 100 = -99%
Formula
Percentage change = [(8 - 803) / 803] x 100
Subtract the new number by the original number
8 - 803 = -795
-795 ÷ 803 = -0.9900373599003736
-0.9900373599003736 x 100 = -99%