Here's an example:
4 2/3 times 6
1. You multiply the denominator and the outside number
4 times 3 equals 12
2. Then, you add the numerator to the product of your denominator and the outside number
12+2=14
3. Your improper fraction is now 14/3
(Your denominator will always stay the same)
4. Then, you just multiply
14 times 6 equals 84
3 times 1 equals 3
5. Then you simplify it and your answer is 28