-97.75% is the change from 890 to 20
Calculation steps:
[( 20 - 890 ) ÷ 890] x 100 = -97.75%
Formula
Percentage change = [(20 - 890) / 890] x 100
Subtract the new number by the original number
20 - 890 = -870
-870 ÷ 890 = -0.9775280898876404
-0.9775280898876404 x 100 = -97.75%