-15.07% is the change from 989 to 840
Calculation steps:
[( 840 - 989 ) ÷ 989] x 100 = -15.07%
Formula
Percentage change = [(840 - 989) / 989] x 100
Subtract the new number by the original number
840 - 989 = -149
-149 ÷ 989 = -0.1506572295247725
-0.1506572295247725 x 100 = -15.07%