Question

You have a $50 gift card to go shopping for school supplies. You buy 2 packs of pencils, 5 notebooks, 6 folders, 1 pack of pens, 3 packs of paper, 1 pack of highlighters, and 2 binders.

a. What number represents the change in the value of the gift card after buying your school supplies?

b. What percentage of the value remains on your gift card?

Answer 1

Step 1: Find the amount remaining

The change in the value of the gift card after buying 2 packs of pencils, 5 notebooks, 6 folders, 1 pack of pens, 3 packs of paper, 1 pack of highlighters, and 2 binders.

$$\begin{gathered} =50–\left[2\right(1.98)+5(2.95)+6(0.75)+1(1.57)+3(0.89)+1(3.45)+2(3.55\left)\right] \\ =50-[3.96+14.75+4.5+1.57+2.67+3.45+7.1] \\ =50-38 \\ =12 \end{gathered}$$

Hence, the amount remaining on the gift card $=\$12$

Step 2: Find the percentage of the value remains on gift card

The percentage of the value that remains on gift card $=\frac{(100\times 12)}{50}\%=24\%$

Hence, the change in the value of the gift card after buying school supplies $=12\$$

The percentage of the value that remains on gift card $=24\%$