In an HDB block at Tampines, there are 80 residents. Of these residents, 20 are children. What percentage of the residents are children?
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Worked Solution
Step 1: Identify the part and the whole. Part = 20 children. Whole = 80 residents.\n
Step 2: Write as a fraction: 20 / 80.\n
Step 3: Simplify: 20 / 80 = 1 / 4.\n
Step 4: Convert to a percentage: 1 / 4 × 100% = 25%.\nCheck: 25% of 80 = 0.25 × 80 = 20 children. ✓
Answer: 25%
Correct answer: 25%
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