-73.91% is the change from 663 to 173
Calculation steps:
[( 173 - 663 ) ÷ 663] x 100 = -73.91%
Formula
Percentage change = [(173 - 663) / 663] x 100
Subtract the new number by the original number
173 - 663 = -490
-490 ÷ 663 = -0.7390648567119156
-0.7390648567119156 x 100 = -73.91%