HOTS Mathematics Primary 6 Ratio

A pandan cake recipe uses flour and sugar in the ratio 4 : 3. Mei Ling uses 540 g of flour. After baking, she eats 1/3 of the sugar portion she used. How many grams of sugar remain?

A 405 g
B 270 g
C 180 g
D 135 g
Show Worked Solution

Worked Solution

Step 1: Flour : Sugar = 4 : 3. Step 2: Sugar used = (3/4) × 540 = 405 g. Step 3: Mei Ling eats 1/3 of the sugar: eaten = (1/3) × 405 = 135 g. Step 4: Sugar remaining = 405 − 135 = 270 g. (Alternatively: remaining = (2/3) × 405 = 270 g.)

Correct answer: 270 g

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