JAMB and WAEC Mathematics questions: Fractions, decimals, approximations and percentages

56 questions with answers and explanations. Tap an option to check yourself.

1. Question 21· Fractions, decimals, approximations and percentages· JAMB

   Express 0.06724 correct to two significant figures.

   • A0.0672
   • B0.068
   • C0.07
   • D0.067

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   Explanation and discussion

2. Question 22· Fractions, decimals, approximations and percentages· JAMB

   Simplify 1¼ + 2⅓.

   • A3 2/7
   • B3 7/12
   • C3½
   • D4 1/12

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   Explanation and discussion

3. Question 23· Fractions, decimals, approximations and percentages· WAEC

   A trader bought a bag of rice for ₦40,000 and sold it for ₦46,000. Find the percentage profit.

   • A6%
   • B13%
   • C15%
   • D18%

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   Explanation and discussion

4. Question 24· Fractions, decimals, approximations and percentages· JAMB

   Find the compound interest on ₦10,000 at 10% per annum for 2 years.

   • A₦2,100
   • B₦2,000
   • C₦12,100
   • D₦1,100

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   Explanation and discussion

5. Question 25· Fractions, decimals, approximations and percentages· WAEC

   A woman buys a bag for ₦6,000 and sells it for ₦7,500. Find her percentage profit.

   • A20%
   • B25%
   • C15%
   • D30%

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   Explanation and discussion

6. Question 26· Fractions, decimals, approximations and percentages· WAEC

   Round 3.14159 to three decimal places.

   • A3.141
   • B3.142
   • C3.14
   • D3.1416

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   Explanation and discussion

7. Question 27· Fractions, decimals, approximations and percentages· JAMB

   Express the recurring decimal 0.666… as a fraction.

   • A3/5
   • B2/3
   • C6/10
   • D5/6

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8. Question 28· Fractions, decimals, approximations and percentages· JAMB

   Find the simple interest on ₦20,000 at 5% per annum for 3 years.

   • A₦1,000
   • B₦3,000
   • C₦300
   • D₦6,000

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   Explanation and discussion

9. Question 29· Fractions, decimals, approximations and percentages· WAEC

   Express 0.000 307 in standard form.

   • A30.7 × 10⁻⁵
   • B3.07 × 10⁻³
   • C3.07 × 10⁻⁴
   • D3.07 × 10⁴

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10. Question 30· Fractions, decimals, approximations and percentages· JAMB

    Share ₦4,500 between Ade and Bisi in the ratio 4 : 5. How much does Ade get?

    • A₦900
    • B₦2,500
    • C₦1,800
    • D₦2,000

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    Explanation and discussion

11. Question 31· Fractions, decimals, approximations and percentages· WAEC

    Find the simple interest on ₦25,000 for 3 years at 8% per annum.

    • A₦2,000
    • B₦6,000
    • C₦31,000
    • D₦8,000

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12. Question 32· Fractions, decimals, approximations and percentages· WAEC

    Calculate the simple interest on ₦18,000 for 4 years at 5% per annum.

    • A₦900
    • B₦3,600
    • C₦21,600
    • D₦4,500

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13. Question 33· Fractions, decimals, approximations and percentages· WAEC

    Simplify 4⅜ − 2⅚.

    • A1 13/24
    • B2 13/24
    • C1 11/24
    • D1 1/2

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14. Question 34· Fractions, decimals, approximations and percentages· JAMB

    A man spends 1/4 of his salary on rent and 2/5 of the remainder on food. What fraction of his salary is left?

    • A7/20
    • B9/20
    • C11/20
    • D3/10

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15. Question 35· Fractions, decimals, approximations and percentages· WAEC

    Express 5/8 as a percentage.

    • A62.5%
    • B58%
    • C40%
    • D85%

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    Explanation and discussion

16. Question 36· Fractions, decimals, approximations and percentages· WAEC

    ₦12,000 is shared between Ade and Bisi in the ratio 3 : 5. Find Bisi's share.

    • A₦7,500
    • B₦4,500
    • C₦7,200
    • D₦2,400

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17. Question 37· Fractions, decimals, approximations and percentages· JAMB

    Express 0.00467 correct to one significant figure.

    • A0.004
    • B0.005
    • C0.0047
    • D0.01

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18. Question 38· Fractions, decimals, approximations and percentages· JAMB

    A man sold a radio for ₦13,800 at a loss of 8%. Find the cost price.

    • A₦12,696
    • B₦14,904
    • C₦15,000
    • D₦12,000

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19. Question 39· Fractions, decimals, approximations and percentages· WAEC

    A trader bought a radio for ₦8,000 and sold it for ₦9,200. Find his percentage profit.

    • A12%
    • B13%
    • C20%
    • D15%

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20. Question 40· Fractions, decimals, approximations and percentages· JAMB

    Find 2.5% of ₦8,000.

    • A₦320
    • B₦20
    • C₦2,000
    • D₦200

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    Explanation and discussion