If there are 12 black pens and 10 blue pens, write the ratio of black pens to total pens as a fraction in simplest form
Ok 12 black pens and 10 blue pens. The ratio of black/total is then 12/(10+12) = 12/22. To find the simplest form, you have to divide both of those numbers by their greatest common factor, which is 2. Then, your fraction of black/total is 6/11.
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