-16.78% is the change from 989 to 823
Calculation steps:
[( 823 - 989 ) ÷ 989] x 100 = -16.78%
Formula
Percentage change = [(823 - 989) / 989] x 100
Subtract the new number by the original number
823 - 989 = -166
-166 ÷ 989 = -0.1678463094034378
-0.1678463094034378 x 100 = -16.78%