-8.99% is the change from 890 to 810
Calculation steps:
[( 810 - 890 ) ÷ 890] x 100 = -8.99%
Formula
Percentage change = [(810 - 890) / 890] x 100
Subtract the new number by the original number
810 - 890 = -80
-80 ÷ 890 = -0.0898876404494382
-0.0898876404494382 x 100 = -8.99%