# Sarin’s family in Kluang part 26 (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 presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn the skills of dealing with the Math Modeling, the Problem Sum from Lower Primary School to Upper Primary School level after reading the blog postings. This posting is an upper primary school math question on Percentage and Charts.

Story line reference :

Sarin’s family in Kluang

Math concept reference :

Sarin learns Average Number, Percentage, Tables and Charts (Math Concept)

Sarin learns concept of ratio in school

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

Upper primary school mathematics question UPQ588

The pie chart below shows the type of buns sold at a shop last week. The shop sold 900 buns in all. Half of the buns sold were chocolate. The shop sold 20% more cheese buns than vanilla buns.

a.         How many banana buns did the shop sell?

b.         What percentage of the buns sold last week were cheese buns? Solution:

a.         100% ==> 900

1% ==> 9 buns

17% ==> 9 × 17 = 153 buns

The number of Banana buns = 153

b.         Total percentage of Cheese buns and Vanilla buns

= 50% – 17%

= 33%

33% ==> 33 × 9 = 297

The ratio of cheese buns to vanilla buns = 120 : 100 = 6 : 5

11 units = 297

1 unit = 27 buns

The number of cheese buns sold

= 6 × 27

= 162

The percentage of cheese buns sold

= 162 ÷ 900 × 100%

= 18%