The school canteen stall uses a recipe where flour and sugar are mixed in the ratio 5 : 3. Auntie Lim originally planned to use 400 g of flour. She decides to increase the amount of flour to 600 g instead and adjusts the sugar accordingly to keep the same recipe ratio. How many grams of sugar does she need for the new batch?
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Worked Solution
Step 1: Identify the ratio and the new flour amount.
Flour : Sugar = 5 : 3
New flour amount = 600 g
Step 2: Find the value of 1 part based on the new flour amount.
1 part = 600 ÷ 5 = 120 g
Step 3: Find the amount of sugar needed.
Sugar = 3 parts = 3 × 120 = 360 g
Verification using equivalent ratios:
5 : 3 = 600 : ? → multiply both parts by 120
5 × 120 = 600 ✓
3 × 120 = 360 ✓
Auntie Lim needs 360 g of sugar.
Correct answer: 360 g
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