another maths ques help please

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saimaj21
Posts: 35
Joined: Thu Sep 30, 2010 9:03 am

another maths ques help please

Post by saimaj21 »

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
mitasol
Posts: 2756
Joined: Wed Feb 27, 2008 9:59 am

Re: another maths ques help please

Post by mitasol »

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
First-timer
Posts: 698
Joined: Wed Sep 23, 2009 1:47 pm
Location: Essex

Re: another maths ques help please

Post by First-timer »

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.
chicko-mum
Posts: 294
Joined: Wed Apr 28, 2010 12:19 pm

Re: another maths ques help please

Post by chicko-mum »

4/5of A = £5.20
ie A = 5.20x5/4
A = £6.50
saimaj21
Posts: 35
Joined: Thu Sep 30, 2010 9:03 am

Re: another maths ques help please

Post by saimaj21 »

thank you so much for your replies got it!
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