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By: Tping (offline)  Friday, December 28 2012 @ 10:25 PM CST (Read 852 times)  
Tping

1)
Joyce got a discount of 20% on a skirt whose usual price was $50
and a discount of $14 on a blouse whose usual price was $46.
Express the total discount she got as a percentage of the total usual price of the items.

2)
Catherine and Isaac shared the cost of a birthday present for their father.
Isaac paid $74. If he had paid $39 less,
the amount of money Catherine must pay will increase by 65%.
What was the cost of the present?

3)
If Mr Lam sold a refrigerator at 65% of the cost price,
the refrigerator will be sold at $715.
What price does he does he have to sell if he wants to meke a profit of $215?

Thank you in advance.






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By: echeewh (offline)  Sunday, December 30 2012 @ 12:41 PM CST  
echeewh

hey tping

Following pls find my worked solution:

Q1.

Discount (Skirt) = (20/100) × 50 = $10
Total discount = 10 + 14 = $24

Total % discount = (24 / 96) × 100 = 25%

Q2

Given that C's share increase by 65% after C had to pay $39 more, we have ...

65% --> 39
100% --> (39 / 65) × 100 = 60

So C's share in the present was $60

Cost of present = 60 + 74 = $134

Q3

65% --> 715
100% --> (715 / 65) × 100 = 1100 {cost price=CP}

To make a profit of $215, selling price would be ...

1100 + 215 = $ 1315

==============

Trust the above helps.

Do let me know again if these are different from your Answerkey or if there's further clarification.

Cheers,
Edward.

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