-82.81% is the change from 989 to 170
Calculation steps:
[( 170 - 989 ) ÷ 989] x 100 = -82.81%
Formula
Percentage change = [(170 - 989) / 989] x 100
Subtract the new number by the original number
170 - 989 = -819
-819 ÷ 989 = -0.8281092012133469
-0.8281092012133469 x 100 = -82.81%