There are an infinite number of them. Here are a few:
2.1 2.2 2.3 2.3000000001 2.30000000000000006 2.5 2.00009 . . etc.
How to find them:
You probably never heard this before, but I'll bet you'll remember it from now on:
<em>ANY number that you can write down on paper completely, </em><em>using digits and a decimal point if you need it but no symbols, is a rational number.</em>
If you can write it down completely without any 'comments', then it's rational.
3/8 times 3 equals 9/8 which is also 1 1/8. If you multiply 3/4 by two (numerator and denominator) then you will get 6/8. And if you multiply 9/8( I just find it easier with 9/8) by 6 you will get 54/8. And the grain will last for 6.75 days.
