Question

When a local office supply store sells5 packs of paper, it also sells 8 packsof envelopes. How many packs ofenvelopes would the store sell if it sold15 packs of paper?

Answer 1

Since we know that when the office sells 8 packs of envelopes for every 5 packs of paper, we can express the ratio of packs of paper to envelopes like this:

`\frac{\text{packs of envelopes}}{\text{packs of paper}}=(8)/(5)`

Then if we want to find how many packs of envelopes are sold with 15 packs of paper, we just have to multiply the number of packs of paper (15) by the ratio we expressed above, like this:

`\text{packs of envelopes}=15*(8)/(5)=(120)/(5)=24`

Then, 24 packs of envelopes are sold if the store sells 15 packs of paper