Sarin’s family and Ramadan Part 18 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog postings present the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills to deal with Math Modeling, Math Problem Solving and Problem Sum from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on Percentage and Problem Sum.

You can read the posting on Sarin’s family and Ramadan in Welcome page about story of Sarin’s family during Ramadan.

To read also the posting on Sarin learns Average Number, Percentage, Tables and Charts (Math Concept) to understand the concept of Percentage.

Challenge yourself with the question before look out for the given solution‼

Upper primary school mathematics question UPQ546

Sarin’s mother baked some Almond cakes and Butter cakes during Ramadan. She gave away 30% of the Almond cakes as goodwill. She also gave away some Butter cakes. The number of Butter cakes that she gave was ½ the number of Almond cakes given away. If Sarin’s mother had 42 Almond cakes left, how many Butter cakes did she give away?

Solution:

30% of Almond cakes was gave away

The percentage of Almond cakes left = 100% – 30% = 70%

70% of Almond cakes ==> 42

10% of Almond cakes ==> 6

Total number of Almond cakes ==> 60

30% of Almond cakes ==> 18

Butter cakes given away is half of the number of Almonds cakes given away

Butter cakes given away = 18 ÷ 2 = 9

Alternative solution:

The model,

UPQ546-1

From the model,

14 units = 42

1 unit = 3

The number of Butter cakes given away = 3 × 3 = 9

 More Questions on Problem Sum. Click here…..

More Questions on Percentage. Click here….

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