Asked by Jenn

So this is a "Challenge"
(we don't have to do it but my mum is making me)
we haven't learned it, it's only if you want to do anything harder or more difficult.

1.explain why the ratios 6/9 and 8/12 are in proportion
Answered by bobpursley
reduce each. the firsts reduces to 2/3 (2*3/3*3)
the second has a common factor of 4, so it reduces also.
Answered by Steve
they are in proportion because

8*9 = 6*12

In a proportion

a/b = c/d

ad = bc
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