-8.09% is the change from 989 to 909
Calculation steps:
[( 909 - 989 ) ÷ 989] x 100 = -8.09%
Formula
Percentage change = [(909 - 989) / 989] x 100
Subtract the new number by the original number
909 - 989 = -80
-80 ÷ 989 = -0.08088978766430738
-0.08088978766430738 x 100 = -8.09%