That is called the denominator, and the top is the numerator.:)
numerator
The denominator is the bottom number of the fraction. It tells how many parts in all. The numerator is the top number of the fraction which tells you the number of parts considered.
The number in a fraction that tells how many equal parts are in the whole or group is called the denominator. It is the bottom number of the fraction and represents the total number of equal parts that make up the whole.
This is the denominator, which is the bottom line of the fraction.
The denominator (bottom number) of a fraction tells you the number of equal parts (in a whole); The numerator (top number) of a fraction tells you how many of those parts. You have five parts out of 9 equal parts which is 5/9
The bottom number of the original, unsimplified fraction represents the number of equal parts in one whole, where each part is of the same magnitude as the top number. Once the fraction has been simplified, these links no longer apply directly, but only through equivalence.
There are three parts to a fraction, there is the numerator (the top number), the denominator (the bottom number) and the vinculum (the line in the middle which means 'divide by'-
The bottom number.
I'm not exactly sure what you mean, but the top number is called the numerator and the bottom number is called the denominator.
The denominator
When the fraction is written in its simplest form, if necessary as an improper fraction, the denominator (the number at the bottom gives the number of parts in a whole.
In its simplified form, there is no such number.