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

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

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

   Express 7/20 as a decimal.

   • A0.35
   • B0.7
   • C0.035
   • D3.5

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

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

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

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

   Simplify (2/3 + 1/4) ÷ 11/6.

   • A11/12
   • B2/3
   • C1/2
   • D3/4

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

   Evaluate 0.0036 ÷ 0.12.

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

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

   Simplify 2⅓ − 1¾.

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

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

   Evaluate 2½ − 1¾.

   • A¾
   • B1¼
   • C½
   • D1¾

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

   Evaluate (0.0024 × 0.15) ÷ 0.0012.

   • A30
   • B3
   • C0.03
   • D0.3

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8. Question 8· 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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9. Question 9· Fractions, decimals, approximations and percentages· JAMB

   A length of 5 cm is measured as 4.8 cm. Find the percentage error.

   • A4.2%
   • B2%
   • C0.2%
   • D4%

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10. Question 10· 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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11. Question 11· 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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12. Question 12· 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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13. Question 13· 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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14. Question 14· Fractions, decimals, approximations and percentages· JAMB

    Find the percentage error, to 2 decimal places, when 0.0396 is approximated as 0.04.

    • A1.01%
    • B1.00%
    • C0.40%
    • D4.04%

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15. Question 15· 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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16. Question 16· Fractions, decimals, approximations and percentages· JAMB

    Express 0.00456 in standard form.

    • A4.56 × 10^-2
    • B45.6 × 10^-4
    • C4.56 × 10^-3
    • D4.56 × 10^3

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17. Question 17· 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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18. Question 18· Fractions, decimals, approximations and percentages· JAMB

    A man saves 15% of his monthly salary of ₦80,000. How much does he save each month?

    • A₦68,000
    • B₦15,000
    • C₦1,200
    • D₦12,000

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19. Question 19· Fractions, decimals, approximations and percentages· JAMB

    Simplify (3/4 of 2⅔) ÷ 1⅓.

    • A2/3
    • B3/2
    • C2
    • D8/9

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20. Question 20· 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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