What is 90 over 12 as a mixed number?

To convert 90 over 12 to a mixed number, you first divide 90 by 12. This gives you 7 with a remainder of 6. So, the mixed number is 7 and 6/12. However, you should simplify the fraction by dividing both the numerator and denominator by their greatest common factor, which is 6 in this case. This simplifies to 7 and 1/2.