Improper fractions and mixed numbers are always greater than or equal to 1, while proper fractions are less than 1 and greater than 0. Improper fractions have a numerator that's bigger than it's denominator, while proper fractions have a numerator that's smaller than it's denominator.
Answer:

Step-by-step explanation:

I would assume that you would subtract the 2 integrals from each other, the 13 and -3, which will give you 16, and the integral in between 2 to 6, the integral on the right, and then add 2 to 16 which would be 18, I believe that would be the answer.
First you move -15 over which makes it 7b=5b+12
then you move 5b over so then its 2b=12
divide b=6