You could pick any number from 0.2 to 0.6.
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0.2 0.25 0.3 0.4 0.5 0.6
Then, think of each number as a fraction, like 1/10.
I am going to pick 0.4.
This would be representing four out of ten, or 4/10.
You could also choose a more complicated number, such as 2.25. Just remember that it MUST be terminating, which means it cannot be a repeating decimal (like 3.333). 2.25 would be expressed as 2 and 25/100, or 2 and 1/4.