Question: is 12 over 15 in simplest form?
Answer: In our example of 12/15 = (2 x 2 x 3) / (3 x 5), we can divide the top and bottom by the common factor 3. When we do so, we find that 12/15 = (2 x 2) / 5 or 4/5. So the fraction 12/15 can be simplified or reduced to become the fraction 4/5.