A rational number can be written as a fraction of two integers, with a denominator that is not zero. Every integer, terminating decimal, and repeating decimal qualifies.
Math Dictionary / Rational Number
Rational Number
A rational number is any number that can be written as a fraction of two integers.
Number SystemGrade 7Grade 8Algebra 1GEDSATACT
What it means
Fractions, integers, terminating decimals, and repeating decimals are rational numbers.
Also called: fraction number
Examples
| 3/4 is rational |
| -5 is rational because -5 = -5/1 |
| 0.333… is rational because it repeats |
Common mistake
A decimal can be rational. Terminating and repeating decimals are rational.
Try one
Question: Is 0.75 rational?
Show answer
Yes. 0.75 = 75/100 = 3/4.