Question

Stefan sells jin a bicycle for $114 and a helmet for $18. The toltal cost for jin is 110% of what stefan spent originally to buy the bike and helmet. How much did stefan spend originally? How much money did he make by selling the bicycle and helmet to jin?

Answer 1

$ 12

Explanation:

First, we'll find out how much, in total Jin spent.

114 (bicycle) + 18 (helmet) = $ 132

Now, we know she spent 110% of what Stefan did.

132 = 110% of x (the value stefan spent)

So, we want to get x, the cost, by itself. We will divide 110.

132/110(%) = x

Remember, percent is a decimal that's been moved (2 places to the right), so... (we move it 2 places to the left for a decimal)

132/1.10 = 120

Stafen originally spent $120 on the equipment. Now we subtract this amount from what Jin spent:

132 - 120 = 12

Stefan made $12 off of Jin's purchase.