Question

A diabetes prescription costs $78 online. This is 75% of the cost of the in-store prescription. How much is the in-store prescription? ( with a explanation and work)

Answer 1

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!