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 Post subject: another maths ques help pleasePosted: Sun Nov 07, 2010 12:51 pm

Joined: Thu Sep 30, 2010 8:03 am
Posts: 32
Hii
Ive come across the follwing question:
If 4/5 of sams money is £5.20, how much does he have altogether?

I have found 1/5 which works out to be £1.04 then added that onto £5.20 but the answer in the book is £6.50
what am i doing wrong????

thanks

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 Post subject: Re: another maths ques help pleasePosted: Sun Nov 07, 2010 12:55 pm

Joined: Wed Feb 27, 2008 8:59 am
Posts: 2001
4/5 of the money = £5.20

divide £5.20 by 4 to find 1/5 = £1.30

So £5.20 + £1.30 =£6.50

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 Post subject: Re: another maths ques help pleasePosted: Sun Nov 07, 2010 12:56 pm

Joined: Wed Sep 23, 2009 12:47 pm
Posts: 698
Location: Essex
Need to divide by 4 and then multiply by 5. You know that 4/5 of the money is £5.20. To find 1/5 you need to divide that number by 4 to get £1.30. Multiply that by 5 to find the whole amount.

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 Post subject: Re: another maths ques help pleasePosted: Sun Nov 07, 2010 12:57 pm

Joined: Wed Apr 28, 2010 11:19 am
Posts: 294
4/5of A = £5.20
ie A = 5.20x5/4
A = £6.50

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 Post subject: Re: another maths ques help pleasePosted: Wed Dec 29, 2010 9:12 am

Joined: Thu Sep 30, 2010 8:03 am
Posts: 32
thank you so much for your replies got it!

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