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Author Topic: small math doubt  (Read 1543 times)

Offline °o.O-hash94-O.o°

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small math doubt
« on: March 29, 2010, 09:46:03 am »
hi,

doing the question 1 of paper 4 maths o/n 09!

and i am stuck on (d) part  the answer in mark scheme is 1.92

and i am getting 1.8!

 :'(





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Offline astarmathsandphysics

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Re: small math doubt
« Reply #1 on: March 29, 2010, 10:26:43 am »
When I get home
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Amr Fouad

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Re: small math doubt
« Reply #2 on: March 29, 2010, 11:28:43 am »
Best way to do this is to do it through cross multiplication:

Previous Week  :  Now

x                    : $2.4

100%              : 125%

therefore, x equals: (2.4x100)/125= $1.92
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