WAEC Mathematics questions: Fractions, decimals, approximations and percentages

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

1. Question 1· Fractions, decimals, approximations and percentages· WAEC

   Evaluate 0.0036 ÷ 0.12.

   • A0.3
   • B0.03
   • C0.003
   • D3

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2. Question 2· Fractions, decimals, approximations and percentages· WAEC

   Simplify 2⅓ − 1¾.

   • A7/24
   • B5/12
   • C1 1/12
   • D7/12

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

   A trader buys an article for ₦8,000 and sells it for ₦9,200. Her percentage profit is

   • A13%
   • B12%
   • C15%
   • D20%

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4. Question 4· Fractions, decimals, approximations and percentages· WAEC

   Round 0.04568 to 2 significant figures.

   • A0.05
   • B0.045
   • C0.046
   • D0.0457

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

   Write 0.0004758 correct to two significant figures.

   • A0.0005
   • B0.00047
   • C0.00048
   • D0.000476

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

   Simplify 4¼ − 2⅝ + 1½.

   • A3 1/8
   • B3 3/8
   • C2 7/8
   • D3 5/8

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7. Question 7· Fractions, decimals, approximations and percentages· WAEC

   Express 0.000325 in standard form.

   • A3.25 × 10⁻³
   • B3.25 × 10⁻⁴
   • C32.5 × 10⁻⁵
   • D3.25 × 10⁴

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8. Question 8· Fractions, decimals, approximations and percentages· WAEC

   Convert 0.7̇ (0.777…) to a fraction.

   • A3/4
   • B7/10
   • C77/100
   • D7/9

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

   A sum of money amounts to ₦13,310 after 3 years at 10% compound interest per annum. The principal is

   • A₦9,000
   • B₦11,000
   • C₦10,000
   • D₦12,100

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10. Question 10· Fractions, decimals, approximations and percentages· WAEC

    Correct 0.004567 to three significant figures.

    • A0.00457
    • B0.0046
    • C0.00456
    • D0.005

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11. Question 11· 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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12. Question 12· 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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13. Question 13· 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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14. Question 14· 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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15. Question 15· 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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16. Question 16· 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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17. Question 17· 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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18. Question 18· Fractions, decimals, approximations and percentages· WAEC

    Express 5/8 as a percentage.

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

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19. Question 19· 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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20. Question 20· 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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