Every christmas ruth and mary get given money by their grandad in the ratio of their ages, At christmas in 1997 ruth was 10 years old and mary was 16. In 1997 ruth was given £25. how much was mary given???

Please help me answer this, my homework has to be in for tomorrow:/..

Answers
So the ratio of the ages of Ruth to Mary is 10:16. We know that Ruth received £25 so if we divide her £25 by the 10 parts of the ratio that she is supposed to receive we get a scale factor of 2.5
chloe
22 March 2011
We then multiply 2.5 by 16 to find out Mary's money
chloe
22 March 2011
= 2.5
chloe
22 March 2011
2.5 X 16 =£40
chloe
22 March 2011
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