Answer:
$104
Step-by-step explanation:
1. Set up your problem as a ratio. Put the percentage over 100 on one side of the equation and the the cost of the online prescription over the in-store prescription on the other side. Since we don't know the cost of the in-store prescription, we can write this as x.
78/x = 75/100
2. Next, cross multiply.
75x = 7800
3. Divide by 75 on both sides.
x = 104
4. To check your work, multiply 104 by .75 (the decimal equivalent of 75%) to make sure you get back to the original $78.
104 x .75 = 78
Now you know that your answer is correct.
Hope this helps!
