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.

Nov 14th, 2014

Did you know? You can earn $20 for every friend you invite to Studypool!