-16.99% is the change from 989 to 821
Calculation steps:
[( 821 - 989 ) ÷ 989] x 100 = -16.99%
Formula
Percentage change = [(821 - 989) / 989] x 100
Subtract the new number by the original number
821 - 989 = -168
-168 ÷ 989 = -0.1698685540950455
-0.1698685540950455 x 100 = -16.99%