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Evaluate a sum or difference of percentages of numbers

The same question, asked 2 times: 12 Sep 2025 S3*, 15 Sep 2025 S2. Every wording below, oldest first.

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  1. Question 1

    12 Sep 2025 S3

    61
    Evaluate: 12(12)%12\left(\frac{1}{2}\right)\% of 560 km + 66(23)%66\left(\frac{2}{3}\right)\% of 240 km

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  2. Question 2

    15 Sep 2025 S2

    57
    Evaluate: 80% of 350−37(12)% of 160+11% of 50080\% \text{ of } 350 - 37\left(\frac{1}{2}\right)\% \text{ of } 160 + 11\% \text{ of } 500

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