My math teacher doesn’t know what he’s doing. He passed out a mathsheet to everybody and we got to this certain point. My friend and I figured it out but my other friends got different answers so I went up to ask him who was correct. The question is simple and literally money with percentages.
A case of glasses sold for $17.85 that is marked up 110 %. What is the original price?
I got the answer 16.23 by putting it over proportions, like this:
100 N
—— = ———
110 17.85
1785 = 110n
and I divided 1785 by 110 then rounded to the nearest hundredth.
He did this
17.85 divided by 210 = .085 then times by 100 to get 8.50, but he found the sale price. In the formula he used, it said sale price but when I asked him about it he talked to me like I was a child and stupid.
A case of glasses sold for $17.85 that is marked up 110 %. What is the original price?
I got the answer 16.23 by putting it over proportions, like this:
100 N
—— = ———
110 17.85
1785 = 110n
and I divided 1785 by 110 then rounded to the nearest hundredth.
He did this
17.85 divided by 210 = .085 then times by 100 to get 8.50, but he found the sale price. In the formula he used, it said sale price but when I asked him about it he talked to me like I was a child and stupid.
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