JAMB Mathematics questions: Fractions, decimals, approximations and percentages

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

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

   Correct 3.14159 to three decimal places.

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

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   Explanation and discussion

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

   A car bought for ₦4,500,000 loses 20% of its value each year. What is it worth after 2 years?

   • A₦3,600,000
   • B₦2,700,000
   • C₦2,880,000
   • D₦2,520,000

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   Explanation and discussion

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

   A trader buys goods for ₦12,000 and sells them for ₦15,000. Find the percentage profit.

   • A20%
   • B25%
   • C30%
   • D15%

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   Explanation and discussion

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

   A shirt marked ₦4,000 is sold at a discount of 15%. What is the selling price?

   • A₦3,400
   • B₦3,600
   • C₦3,850
   • D₦3,000

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   Explanation and discussion

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

   The ratio of boys to girls in a class is 5 : 3. If there are 15 girls, how many students are in the class?

   • A45
   • B25
   • C40
   • D24

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

   A car bought for ₦2,000,000 depreciates by 10% of its value each year. Find its value after 2 years.

   • A₦1,800,000
   • B₦1,600,000
   • C₦1,620,000
   • D₦1,640,000

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

   Round 0.048573 to three significant figures.

   • A0.0486
   • B0.048
   • C0.049
   • D0.0485

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   Explanation and discussion