There are 20 pens. Thirteen of the pens are black. Seven of the pens are blue. What fraction of the pens are blue?

Mathematics · Middle School · Tue Nov 03 2020

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So we know that from the entire thing, we have 7 pens that are blue. Since we have 20 pens, that means that the fraction of the pens that are blue are 7/20. 

So 7 pens out of 20 pens. That is equal to 7/20.