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That it can be expressed as a ratio (hence rational) of two integers, the denominator being positive.

In decimal representation, it is a necessary and sufficient condition that the number can be expressed as either a terminating decimal or one that becomes a recurring decimal after a finite number of digits.

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Q: What does it mean for a number to be rational?
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What do you mean about rational number?

A rational number is one that has an ending.


Why is a whole number rational?

Yes, all whole numbers (integers) are rational. Please note though that not all rational numbers are integers.


Is the square root of 100 an irrational or rational number?

It is neither but if you mean the square root of 100 then it is 10 which is a rational number


Is 2 13 a rational number why or why not?

If you mean 213 then it is a rational number because all integers or whole numbers are rational numbers.


What is the rational number for 1.5?

1.5 is a rational number as it is. If you mean expressing it as a ratio: try 3/2


What is the rational number of 0.3?

0.3 is a rational number. The fact that it is expressed as a decimal does not mean it is not rational. As a ratio, it can be written as 3/10.


Is -4.7 a rational number?

4.7 is already a rational number. If you mean as a mixed number, this is equal to 4 7/10 or four and seven tenths.


Is the fraction 4 9 rational?

If you mean 4/9 as a fraction then it is a rational number


What is a ratio number?

I think you mean rational number. A rational number is any number that you can write as a fraction (or ratio) of two integers (+/- 1,2,3,... etc)


Is 0.166666666666666667 a rational number?

If you mean recurring .... 6 then it is a rational number because it can be expressed as a fraction in the form of 1/6


How do you express 0.09 percent as a whole number?

you mean as a rational number?..if rational: 9/100..and i believe it cannot be made whole..


Is this number 2.247.000 rational or irrational?

We don't understand a number with two decimal points in it. If you mean the number that we would write with commas in the US: 2,247,000 then that number is rational.