not science but maths...

[ytrewq]

My sons maths homework is..Look at the fractions 1/2 to 1/20. Which are recurring if the numerator changes? Is there a pattern? Do they mean if 1/4 changes to 2/4 it is equal to 1/2 so therefore recurring? Any help please. Oh and he is year 8 so it shouldn't be to difficult

[TCL-MUMPING]

Yup that's what it means, if you can divide the same number into the numbers above and below the line then you can make it simpler. The same is true in reverse, you can multiply the top and bottom by the same number and then then see that different fractions are in fact the same!

[ytrewq]

Thank-you - Homework done

[factor-fiction]

I was initialy puzzled by the use of the word 'recurring'.
Recurring is normally used to describe decimal fractions like one third which is 0.333333333.. recurring (that is, an infinite number of decimal places). But I don't think the question would make much sense if that were the interpretation.
So I think the approach you have taken is correct