The blog postings are about the Singapore Math. The readers can learn from the postings about Solving Singapore Primary School Mathematics. The blog presenting the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids will able to acquire knowledge of dealing with the Math Modeling, the Math Problem Solving and 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 Charting.

You can click here and read the posting **A family in Singapore** about Sarin’s family.

You should read the posting on __Sarin learns Average Number, Percentage and Charting in school (Math Concept)__ to understand the concept of Percentage and charting.

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

**Upper primary school mathematics question UPQ551**

A survey on monthly household income of the residential housing blocks in Simei Estate was conducted. The graph below shows the monthly household income of the household in Sarin’s family residential block.

a. How many families have a monthly household income of more than or equal to $4000 per month?

b. Sarin’s family household income if falling in the category of $2000 to $2999. What is the percentage of household in his residential block falling in same category?

Solution:

a. From the graph,

The number of household in $4000 to $4999 category = 19

The number of household in above $5000 category = 13

The number of household with income above or equal $4000 per month = 19 + 13 = __32__

b. Total number of household in the survey = 14 + 22 + 26 + 32 = 94

The total number of household in $2000 to $2999 category = 22

The percentage of household in $2000 to $2999 category = 22/94 × 100% = __23.40%__

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