# Sarin and his coin bank part 23 (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 presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can aquire the skills of dealing with Math Model, Problem Sum start from Lower Primary School to Upper Primary School level after read the postings. This posting is an Upper primary school math question on Fraction and Problem sum.

You can read posting Sarin and his coin bank on the story of coin bank.

You should read the posting on Sarin learns the concept of Fraction (mathematics concept) to understand Fraction and Portion.

Read also the posting on Sarin learns Average Number, Percentage and and Charting in school (Math Concept) to understand the concept of Percentage.

Let try to solve the Question before you look out for the solution‼!

Upper primary school mathematics question UPQ249

Fatimah had \$80 more than her brother Sarin In each of their coin banks. After Fatimah deposited 25% of her money and her brother Sarin deposited 75% of his money to the bank, they still have \$420 left with altogether.
(a) How much did Fatimah have left in the end ?
(b) Express the amount of money her brother Sarin had left as a fraction of the amount of money Fatimah had in the end.

Solution:

Fatimah deposited 25% of her money

In fraction, she deposited ¼ of her money and left with ¾ in the coin bank

Sarin deposited 75% of his money

In fraction, he deposited ¾ of his money and left with ¼ in the coin bank

Draw the model with \$80 different

From the model

4U + 80 ÷ 4 = 420

4U = 400

1U = 100

Money that Fatimah left with in the end = 3 × 100 = \$300

Money that her brother left with in the end = \$120

Fraction of brother’s money to Fatimah’s money = 120/300 = 2/5