IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => IGCSE/ GCSE => Math => Topic started by: °o.O-hash94-O.o° on March 29, 2010, 09:46:03 am

Title: small math doubt
Post by: °o.O-hash94-O.o° 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!

 :'(





Title: Re: small math doubt
Post by: astarmathsandphysics on March 29, 2010, 10:26:43 am
When I get home
Title: Re: small math doubt
Post by: Amr Fouad 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