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 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 Fraction and Ratio.

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

Read the posting on **Sarin learns concept of ratio in school**** **to understand the concept of Ratio.

Read also the posting on **Sarin learns the concept of Fraction (mathematics concept)**** **to understand the concept of Fraction.

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

**Upper primary school mathematics question UPQ402**

Fatimah’s mass was 1/4 of Hairu’s mass. Hairu’s mass was 4/5 of Sarin’s mass. What was the ratio of Fatimah’s mass to Sarin’s mass to the total mass of three of them?

Solution:

Visualise from the Math Model

Fatimah’s mass in unit = 1

Sarin’s mass in unit = 5

Total mass in unit = 1 + 4 + 5 = 10

The ratio of Fatimah’s mass to Sarin’s mass to the total mass of three of them = 1 : 5 : 10

Alternative Solution:

Fatimah’s mass was 1/4 fraction of Hairu’s mass

In ratio

Fatimah’s mass : Hairu’s mass = 1 : 4

Hairu’s mass was 4/5 fraction of Sarin’s mass

In ratio

Hairu’s mass : Sarin’s mass = 4 : 5

Fatimah’s mass : Hairu’s mass : Sarin’s mass = 1 : 4 : 5

Fatimah’s mass : Sarin’s mass : Total mass = 1 : 5 : 10

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