Cancelling down fractions using prime factorising

[ToadMum]

Toadmum - I apologise, that was a typing error on my part & should have read 37 as opposed to 38. Sorry for any confusion, it really has been one of those days!

Sending waves of empathy across the ether . It's been one of those evenings here, too (nothing to do with maths, though. At least, not so far..).

[Proud_Dad]

I think the way your DD writes out her working might be causing her confusion. ( it confused me anyway!). I'd suggest teaching her to write it out the way guest55 did.

[Guest55]

I think the fact that the denominator was prime makes it seem harder .... can she do the others which involve both numerator and denominator?

Personally I would not tend to look at just primes when teaching simplifying fractions - we don't use the word 'cancel' ...