| A | B |
| numerator | top number in a fraction (dividend). Tells how many parts of the whole. |
| denominator | bottom number in a fraction (divisor). Tells how many parts the whole is divided into. |
| fraction | number describing part of a whole when the whole is cut into equal pieces |
| equivalent fraction | two fractions naming the same amount |
| lowest terms | a fractional amount where the numerator and denominator have no common factor other than 1 |
| simplest terms (or form) | a fractional amount where the numerator and denominator have no common factor other than 1. A synonym for lowest terms. |
| greatest common factor (GCF) | the largest whole number that divides two (or more) whole numbers |
| improper fraction | a fraction whose numerator is greater than or equal to its denominator |
| mixed number | a number combining a whole number and a fraction |
| proper fraction | a fraction with a value less than 1 |
| proper form | a fraction converted to a a mixed number if the numerator is greater than the denominator |
| terminating decimal | a decimal number that ends on the right |
| repeating decimal | a decimal number that repeats a pattern of digits on the right |
| common denominator | a denominator that is the same in two (or more) fractions |