### Instruction: Simplify $\frac{91}{26}.$.### Response: I notice that 91 and 26 are both divisible by 13, so I can use that to simplify the fraction.
I divide both the numerator and the denominator by 13, and get $\frac{7}{2}$ as the simplified fraction.
I can also write this as a mixed number, by dividing 7 by 2 and writing the quotient and the remainder.
I get 7 divided by 2 is 3 with a remainder of 1, so the mixed number is $3\frac{1}{2}.$