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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 change a percentage to fraction, divide it by 100 and then reduce the fraction to its lowest term.

Example 1

Express the following as fractions in their simplest form.

a. 25%

b. 56%

c. 45 ┬╝ %

d. 25.25%

Solution

a. 25% = \( \frac{25}{100}\\ = \frac{5}{20}\\ = \frac{1}{4} \)

b. 56% = \( \frac{56}{100}\\ = \frac{28}{50} \\ = \frac{14}{25} \)

c. 45 ┬╝ % = \( \frac{45 \frac{1}{4}}{\frac{100}{1}} \\ = \large \frac{ \frac{181}{4}}{\frac{100}{1}} \\= \frac{181}{4} \: \times \: \frac{1}{100} \\ = \frac{181}{4 \: \times \: 100} \\ = \frac{181}{400} \)

d. 25.25% = \( \large \frac{\frac{2525}{100}}{\frac{100}{1}} \\ = \frac{2525}{100} \: \times \: \frac{1}{100} \\ = \frac{2525}{100 \: \times \: 100} \\ = \frac{2525}{10000} \\ = \frac{505}{2000} \\ = \frac{101}{400} \)

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