# Prealgebra: Variables

### Terms

Denominator  -  The number below the line in a fraction. Denotes how many parts the whole is divided into.
Equivalent  -  Two fractions that express the same part of a whole. There is a number by which both the numerator and denominator of one fraction can be multiplied or divided to yield an equivalent fraction. 1/4, 2/8, and 3/12 are all equivalent fractions.
Fraction  -  Describes part of a whole. 3/4, 1/6, and 19/4 are all examples of fractions.
Improper Fraction  -  A fraction whose numerator is equal to or greater than its denominator.
Least Common Denominator  -  The least common multiple of the denominators of two or more fractions. That is, the lowest number which is a multiple of both denominators.
Lowest Terms  -  A fraction whose numerator and denominator have no common factors is in lowest terms.
Mixed Number  -  A number composed of a whole number and a fraction.
Numerator  -  The number above the line in a fraction. Denotes the number of parts out of the whole that are being taken.
Proper Fraction  -  A fraction whose numerator is smaller than its denominator.
Reduced  -  Written in lowest terms; that is, written as a fraction whose numerator and denominator have no common factors.
Repeating Decimals  -  Decimals that endlessly repeat one number or a group of numbers.
Terminating Decimals  -  Decimals that do not continue after a certain place (that continue in an endless string of zeros).

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