The process for simplifying rational expressions really is the same as the process as simplifying fractions. For example, if you were going to simplify the fraction 5/20, you would find a common divisor and divide that piece out of both the numerator and the denominator. In this...

## Answers by Kathryn A.

Hi Wyatt, Another way to think about this question is to try to turn the sentence into an equation that you can solve. The number we're looking for is the total number of students in the class, so we'll use "x" for that part. 12 students (who happened to be absent)...