-97.51% is the change from 803 to 20
Calculation steps:
[( 20 - 803 ) ÷ 803] x 100 = -97.51%
Formula
Percentage change = [(20 - 803) / 803] x 100
Subtract the new number by the original number
20 - 803 = -783
-783 ÷ 803 = -0.975093399750934
-0.975093399750934 x 100 = -97.51%