49 % = 75 miles
We will use the formula
%= discount / original × 100
49 = (75 / x) × 100 divide the other side by 100 to get rid of it.
49/100 = 75/×
0.49 = 75/× now move x to the other side by mutiplying it
0.49× = 75 now rearrange for x, which is done by bringing 0.49 to the other side by diving it.
× = 75/0.49
× = 153.06