Mia needs to separate 270 blue pens and 180 red pens into packs. Each pack will have the same number of blue pens and the same number of red pens. What is the greatest number of packs she can make? How many red pens and how many blue pens will be in each pack?

The greatest number of packs is gonna be the GCF of 180 and 270, which is 90 packs.

270/90 = 3
180/90 = 2

so Mia can make 90 packs each pack containing 3 blue pens and 2 red pens