-82.61% is the change from 989 to 172
Calculation steps:
[( 172 - 989 ) ÷ 989] x 100 = -82.61%
Formula
Percentage change = [(172 - 989) / 989] x 100
Subtract the new number by the original number
172 - 989 = -817
-817 ÷ 989 = -0.8260869565217391
-0.8260869565217391 x 100 = -82.61%