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Round the percentage. 19% is approximately 20%.

Mathematics

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7. A tech store offers a 19% discount on a laptop priced at K2,995. Estimate the amount of the discount.

  1. Round the percentage.

    19% is approximately 20%.

  2. Round the price.

    K2,995 is approximately K3,000.

  3. Calculate the estimated discount.

    20% of K3,000=20100×3,000=0.20×3,000=K60020\% \text{ of } K3,000 = \frac{20}{100} \times 3,000 = 0.20 \times 3,000 = \boxed{K600}

    Section C: Estimating a Quantity as a Percentage (6 Marks)

    8. In a class of 39 students, 19 are wearing glasses. Estimate the percentage of students wearing glasses.

  4. Round the number of students wearing glasses.

    19 is approximately 20.

  5. Round the total number of students.

    39 is approximately 40.

  6. Calculate the estimated percentage.

    2040×100%=12×100%=50%\frac{20}{40} \times 100\% = \frac{1}{2} \times 100\% = \boxed{50\%}

    9. A football player scored 9 goals out of 41 attempts. Estimate his scoring rate as a percentage.

  7. Round the number of goals.

    9 is approximately 10.

  8. Round the total number of attempts.

    41 is approximately 40.

  9. Calculate the estimated scoring rate.

    1040×100%=14×100%=25%\frac{10}{40} \times 100\% = \frac{1}{4} \times 100\% = \boxed{25\%}

    Section D: Word Problems on Estimation (10 Marks)

    10. A farmer harvests 487 apples from one tree and 512 apples from another.

    a) Estimate the total number of apples harvested by rounding to the nearest hundred.

  10. Round the apples from the first tree.

    487 rounded to the nearest hundred is 500.

  11. Round the apples from the second tree.

    512 rounded to the nearest hundred is 500.

  12. Add the rounded numbers to estimate the total.

    500+500=1,000 apples500 + 500 = \boxed{1,000 \text{ apples}}
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