-98.99% is the change from 989 to 10
Calculation steps:
[( 10 - 989 ) ÷ 989] x 100 = -98.99%
Formula
Percentage change = [(10 - 989) / 989] x 100
Subtract the new number by the original number
10 - 989 = -979
-979 ÷ 989 = -0.9898887765419616
-0.9898887765419616 x 100 = -98.99%