-28.51% is the change from 242 to 173
Calculation steps:
[( 173 - 242 ) ÷ 242] x 100 = -28.51%
Formula
Percentage change = [(173 - 242) / 242] x 100
Subtract the new number by the original number
173 - 242 = -69
-69 ÷ 242 = -0.28512396694214875
-0.28512396694214875 x 100 = -28.51%