-17.19% is the change from 989 to 819
Calculation steps:
[( 819 - 989 ) ÷ 989] x 100 = -17.19%
Formula
Percentage change = [(819 - 989) / 989] x 100
Subtract the new number by the original number
819 - 989 = -170
-170 ÷ 989 = -0.1718907987866532
-0.1718907987866532 x 100 = -17.19%