Is 6.48 a rational number?

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Answer 1 · 2016-08-11T18:18:59

$6.48$ is clearly rational

Rational numbers are those which can be written as a fraction (ie as a ratio between two quantities.)

A rational number can be written as $a/b, "where " a and b " are integers, but " b!=0$

Rational numbers include all the integers, all the vulgar fractions as well as the terminating and recurring decimals.

Irrational numbers cannot be written as a fraction and are infinite, non-recurring decimals, for example. $pi, sqrt 10, sqrt 33, sqrt 88$

What about $6.48?$

It is a terminating decimal. (it ends)
It can be written as $648/100$

It is the ratio: $162:25$

$6.48$ is clearly rational