-10.11% is the change from 890 to 800
Calculation steps:
[( 800 - 890 ) ÷ 890] x 100 = -10.11%
Formula
Percentage change = [(800 - 890) / 890] x 100
Subtract the new number by the original number
800 - 890 = -90
-90 ÷ 890 = -0.10112359550561797
-0.10112359550561797 x 100 = -10.11%