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Q: What is 7 divided by 21 written as a rational number?

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Any number that is presented as an integer "over" (aka divided by) an integer is automatically a rational number - that's what the definition of a rational number is.

21 is a rational number.

21/3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

-3 can be written as the ratio of integers, like -3 to 1, or 21 to -7, or -792 to 264, and since it can be written as the ratio of integers, it is a rational number, by definition.

0.105

21/71 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

Rational.

0.21 is a rational number because it can be expressed as a fraction in the form of 21/100

Yes because 21 is a rational number

it is 7x3=21

It is equal to 21/2 which is a rational number

It is rational because it can be expressed as a fraction which is 21/5

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