# Sarin, Hairu and Fatimah make greeting cards for Mother’s Day part 20 (Math Question)

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The blog postings are about the Singapore Math. The readers can learn from the postings on 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 will learn the skill of dealing with Math Question Solving, Math Modeling and Problem Sums 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, Shape and Area.

You can read the story of Sarin and the siblings making greeting cards for their mother by reading the posting on Sarin, Hairu and Fatimah make greeting cards for Mother’s Day in Welcome page.

You can read the posting on Sarin learns Perimeter, Area and Volume in school(Math Concept) to learn the concept of area.

Read the posting on Sarin learns Average Number, Percentage, Tables and Charts (Math Concept) to learn about Percentage.

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

Upper primary school mathematics question UPQ569

Sarin decided to make a colourful greeting for his mother. He used two identical rectangles and some colourful shape of papers to make the card as the figure shown. The two identical rectangles are filled with 6 parts A, B, C, D, E and F of colour papers. If the area of B is 5% of the whole figure, what percentage of the whole figure is the total area of C and F?

Solution:

The card was formed by two identical rectangles,

One rectangle taken up 50%

Since part E and part F are equal in size

Therefore,

Area of part F is 25% of the total of the area of the figure.

A, B, C and D form the left rectangle (Total: 50%)

Part B and part C are equal in size to Part A and part D as the total base and height is equal.

Part B and part C is 25% of the total figure in size or area

If part B is 5%,

Part C = 25% – 5% = 20%

The percentage of Part C and Part F = 20% + 25% = 45%