Is 12 rational or irrational

Step by step

The question

Question: is 12 rational or irrational?

Rational means: it can be written as a fraction, with whole numbers on top and at the bottom.

Then its decimal stops, or repeats for ever.

Irrational means: no fraction works.

Its decimal never stops and never repeats.

1 Write it as a fraction

Any whole number can go over 1.

12 is 12/1.

So 12 is rational.

Every whole number is rational, negative ones too.

2 Check

Let's check: 12 divided by 1 is 12.

The fraction is the same number.

So the answer is right!

Let's look back.

First: write it as a fraction.

Last: check.