Yes, rational fractions consist of one integer divided by a non-zero integer.
Very little.A fraction is one integer divided by another.A rational number is one that could be written as a fraction.
An LCD is a positive integer. But any integer can can be expressed as a fraction : as the same number divided by 1. Or twice the number divided by 2, etc.
A fraction, consisting of one integer divided by another, non-zero, integer is a rational number.
Any integer can be expressed as a fraction. The simplest is the integer itself divided by one.
You end up with an integer and a fraction. The integer is half of (one less than the one you started with), and the fraction is a half.
It may still be a fraction. However, the answer could be an integer. For example, 1/2 divided by 1/8 = 4.