5/8 of the remaining 3/4 was sold in the afternoon.

So how much, of the whole amount, was sold in the afternoon?

Adding on to Zhong Shu Hao's, in math, the word "of" means "×". So 5/8 of 3/4 is actually 5/8 × 3/4 ＝ 15/32

Thank you

Correct

Hope it's correct !

Thanks Pauline and Yeo See Yeong! 😊

Thanks all!

Sorry friends did not understand.

Any simpler way.

Ratio method

Model Method

Nice model Rye Tan...thanks..

Thank you all

Rye Tan thanks for your model. It make it easier to explain to my boy who is v.weak in ratio.

Welcome Jolene Koh! But do make sure that your boy is able to handle ratio well.... Ratio is a large component in PSLE, especially in Booklet B.

It is usually the ratio questions that carry high marks.

Yes I am working on it. Thanks

Shaded area = Total area - Unshaded area = 1 square + 1 circle - (1 square + 0.5 circle) = 0.5 circle = 0.5 x pi x 10 x 10 = 50pi cm^2

1 step only😱 @Raymond Ng

Good afternoon, Angel Low. The total area of the figure is made up of the area of square ABDF and the areas of two semi circle BCD and semi circle DEF (which combine into one single circle of radius 10cm.) The unshaded areas include (1) the right angle triangle BDF, (2) the semi circle inside triangle ABF, (3) the triangle BCD and triangle DEF. The two triangles in (3) combined are equal in area to the bigger triangle in (1). Do you see why? The combined areas of those three triangles is equal to the area of the square ABDF. As for the semi circle in (2), it is equal in area to the area of semi circle BCD or the area of semi circle DEF. I hope that explains why the quick version of the solution is half the area of a semi circle of radius 10cm.

Good afternoon to you too...Your explanation do help!Thank you @Xavier Sng and @Raymond Ng Appreciate it very much!

Hi can you explain ?

Oh it's okay!i understand it!

Thank you @Raymond Ng appreciate it very much