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Maths Revision

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Jason Lun

on 28 April 2010

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Transcript of Maths Revision

Maths Summarys Rule for Simple interest:

Principle x Rate x Time

commision - percentage of sales
Retainer - wage in addition to commision
Rule for discount:
to find the discount %:
Discount $ divided by Mp x 1oo%
to find the discount $:
Discount %(decimal form) x Mp
to find the Sp:
Discount % x Mp - Discount $
Mp-Discount $ - Sp When Multiplying Fractions:
Mixed No. change to improper fractions
cancel them down with HCF 's (Highest Common Fractions)
a x c
b x d
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