-82.65% is the change from 997 to 173
Calculation steps:
[( 173 - 997 ) ÷ 997] x 100 = -82.65%
Formula
Percentage change = [(173 - 997) / 997] x 100
Subtract the new number by the original number
173 - 997 = -824
-824 ÷ 997 = -0.8264794383149449
-0.8264794383149449 x 100 = -82.65%