Question 5 - Percentage

•  Mrs Molly baked 180 cupcakes. 55% of them were of chocolate flavour and the rest were of vanilla flavour. After selling some of the chocolate cupcakes the percentage of the chocolate cupcakes became 40%.

• (a) How many cupcakes were left?
• (b) How many chocolate cupcakes were sold?

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Question 5 - Answer

180 x 55% = 99 (C)


180 – 99 = 81 (V)

After selling some chocolate cupcakes, the chocolate cupcakes = 40%, therefore the vanilla cupcakes = 60%

81 = 60%

1.35 = 1%

135 =100%

(a) There were 135 cupcakes left.


135 x 40% = 54

99 -54 = 45

(b) There were 45 chocolate cupcakes sold.

Question 1 - Percentage

• There are 20 pencils, rulers and pens in the pencil case. 25% of the total number of items are pens. There is 1 fewer ruler than pens. How many pencils are there in the pencil case?

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Question 1 - Answer

First, find the number of pens.

25% x 20 = 25/100 x 20
                = 1/4 x 20
                = 5
There are 5 pens in the pencil case.

Next, find the number of rulers.
5 - 1= 4
There are 4 rulers in the pencil case.

Then, find the number of pencils.
20 - ( 5+ 4 ) = 20 - 9
                    = 11
There are 11 pencils in the pencil case.