25 18
__ x __
20 35


Can someone help me with this please? I get 45 but book states answer is 9
__ ___
14 14

I know 9 x 5 =45 but there is no common factor so I do not see how you can reduce this beyond my answer (unless I have gotten things badly wrong!) Can someone help please showing the working so I can understand.

Thanks.

Cross reduce your numbers. 9/14 is the answer.