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JSS2: MATHEMATICS - 1ST TERM

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  1. Properties of Whole Numbers I | Week 1
    4Topics
    |
    2 Quizzes
  2. Properties of Whole Numbers II | Week 2
    4Topics
    |
    2 Quizzes
  3. Properties of Whole Numbers III | Week 3
    4Topics
    |
    1 Quiz
  4. Indices | Week 4
    2Topics
    |
    1 Quiz
  5. Laws of Indices | Week 5
    5Topics
    |
    1 Quiz
  6. Whole Numbers & Decimal Numbers | Week 6
    4Topics
    |
    1 Quiz
  7. Standard Form | Week 7
    3Topics
    |
    1 Quiz
  8. Significant Figures (S.F) | Week 8
    4Topics
    |
    1 Quiz
  9. Fractions, Ratios, Proportions & Percentages I | Week 9
    6Topics
    |
    1 Quiz
  10. Fractions, Ratios, Proportions & Percentages II | Week 10
    4Topics
    |
    1 Quiz
  11. Fractions, Ratios, Proportions & Percentages III | Week 11
    3Topics
    |
    1 Quiz
  12. Approximation & Estimation | Week 12
    1Topic
    |
    1 Quiz
Lesson Progress
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To find the percentage of a quantity, multiply the quantity by the percentage.

Example 1

Find the following

a. 20%  of  $2600

b. 30% of ₦900

c. 70% of 500 students

Solution

a. 20% of $2600  = \( \frac{20}{100} \scriptsize \: \times \: $2600 \\ =\frac{20}{1\not{0}\not{0}} \scriptsize \: \times \: $26 \not{\!0}\not{\!0} \\= \scriptsize 20 \: \times \: $26 \\ = \scriptsize $520 \)

b. 30% of ₦900  = \( \frac{30}{100} \scriptsize \: \times \: ₦900 \\ =\frac{30}{1\not{0}\not{0}} \scriptsize \: \times \: ₦9 \not{\!0}\not{\!0} \\= \scriptsize 30 \: \times \: ₦9 \\ = \scriptsize ₦270 \) 

c. 70% of 500 students   =    \( \frac{70}{100} \scriptsize \: \times \: 500 \\ =\frac{70}{1\not{0}\not{0}} \scriptsize \: \times \: 5 \not{\!0}\not{\!0} \\ = \scriptsize 70 \: \times \: 5 \\ = \scriptsize 350 \: students \) 

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