Q:

# What is the top number of a fraction called?

A:

The top number in a fraction is called a numerator. The bottom number is called a denominator. The line that separates them can be horizontal or vertical.

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The numerator represents the number of parts and the denominator represents how many parts consist of the whole. It is possible for the numerator to be larger than the denominator, but fractions that represent a value of greater than one are "improper." When the numerator exceeds the denominator the fraction needs to be broken down further.

The denominator of a fraction can never be zero. However, a numerator can be zero and the resulting calculation returns a value of zero.

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## Related Questions

• A:

In fractional math, a numerator is the top number in a fraction, and the denominator is the bottom number. In the fraction one-half, for instance, one is the numerator, and two is the denominator.

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• A:

A rational number is a real number that can be expressed as a fraction or ratio of two integers where the denominator is not zero. Whole numbers, finite decimals and repeating decimals are rational.

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A mixed number is written as a whole number, or integer, followed by a fraction. A mixed number can be converted to or from an improper fraction in which the numerator (top number of a fraction) is of greater value than the denominator (bottom number of a fraction).