GV

Fractions and Decimals

Expressing parts: half, quarter, third, 0.5, 2.75

intermediate

When to Use Fractions and Decimals

  • •Simple fractions: half (1/2), quarter (1/4), third (1/3).
  • •Other fractions: cardinal + ordinal. Two thirds (2/3), three quarters (3/4).
  • •Decimals: point + individual digits. 3.5 = three point five.
  • •Percentages: number + percent. 50% = fifty percent.
  • •With nouns: half of the, a quarter of, two thirds of.

How to Form Fractions and Decimals

Affirmative (+)

Fraction/decimal + of + noun; Noun + is + fraction/decimal

Negative (-)

Same structure with negation

Question (?)

What fraction/percentage...?

💡 Half = 1/2 (not 'one second'). Quarter = 1/4 (not 'one fourth' usually).

Examples of Fractions and Decimals

✓Two thirds of the students passed.

✗Two third of the students passed.

Plural: thirds (not third) for 2/3.

✓The price is 3.99 (three point nine nine).

✗The price is 3.99 (three point ninety-nine).

Say each digit after the point.

✓Half of the cake is gone.

✗A half of the cake is gone.

Half (not a half) before 'of'.

Common Mistakes with Fractions and Decimals

💡 Practice Tips for Fractions and Decimals

  • • 1/2 = a half, 1/4 = a quarter, 1/3 = a third.
  • • 2/3 = two thirds, 3/4 = three quarters.
  • • Decimals: say 'point' then each digit (3.14 = three point one four).
  • • Percentages: number + percent (25% = twenty-five percent).
Quick Quiz
  1. 1.How do you say '1/2'? 
  2. 2.How do you say '3.14'? 
  3. Question 3: 2/3 of the students passed. (write the spoken form for '2/3')blank
    3.2/3 of the students passed. (write the spoken form for '2/3')
  4. Question 4: How would you read '50%' aloud?blank
    4.How would you read '50%' aloud?
  5. Question 5: Read 0.75 aloud: zero point blank
    5.Read 0.75 aloud: zero point
  6. Question 6: He ate 3/4 of the pizza. (write the spoken form for '3/4')blank
    6.He ate 3/4 of the pizza. (write the spoken form for '3/4')
  7. Question 7: blank of the cake is left — about half. (correct article use before 'half')
    7. of the cake is left — about half. (correct article use before 'half')
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