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Mixed Numbers and Improper Fractions

Class 4Fractions (Grade 4)

When a fraction represents a quantity greater than 1, it can be written as either an improper fraction or a mixed number. Both forms represent the same value, and you need to know how to convert between them.

For example, if you have 7 quarter-slices of pizza and each pizza has 4 slices, you have 7/4 (improper fraction) or 1 3/4 (mixed number) pizzas.

What is Mixed Numbers and Improper Fractions - Class 4 Maths (Fractions)?

An improper fraction is a fraction where the numerator is greater than or equal to the denominator. Examples: 5/3, 7/4, 9/2.

A mixed number is a combination of a whole number and a proper fraction. Examples: 1 2/3, 2 1/4, 4 1/2.

Mixed Number ↔ Improper Fraction

Mixed Numbers and Improper Fractions Formula

To convert Improper Fraction to Mixed Number:

  1. Divide the numerator by the denominator.
  2. Quotient = whole number part.
  3. Remainder = numerator of the fractional part.
  4. Denominator stays the same.

To convert Mixed Number to Improper Fraction:

  1. Multiply the whole number by the denominator.
  2. Add the numerator.
  3. Write the result over the same denominator.

Improper = (Whole × Denominator + Numerator) / Denominator

Solved Examples

Example 1: Example 1: Convert Improper to Mixed

Problem: Convert 11/4 to a mixed number.


Solution:

Step 1: Divide 11 by 4. Quotient = 2, Remainder = 3.

Step 2: Mixed number = 2 3/4.

Answer: 11/4 = 2 3/4

Example 2: Example 2: Convert Improper to Mixed

Problem: Convert 17/5 to a mixed number.


Solution:

Step 1: 17 ÷ 5 = 3 remainder 2.

Step 2: Mixed number = 3 2/5.

Answer: 17/5 = 3 2/5

Example 3: Example 3: Convert Mixed to Improper

Problem: Convert 2 3/7 to an improper fraction.


Solution:

Step 1: Multiply whole number by denominator: 2 × 7 = 14.

Step 2: Add numerator: 14 + 3 = 17.

Step 3: Write over the same denominator: 17/7.

Answer: 2 3/7 = 17/7

Example 4: Example 4: Convert Mixed to Improper

Problem: Convert 4 1/3 to an improper fraction.


Solution:

Step 1: 4 × 3 = 12.

Step 2: 12 + 1 = 13.

Step 3: 13/3.

Answer: 4 1/3 = 13/3

Example 5: Example 5: When Numerator Equals Denominator

Problem: Convert 8/8 to a mixed number.


Solution:

Step 1: 8 ÷ 8 = 1 remainder 0.

Step 2: Since remainder is 0, the result is just a whole number.

Answer: 8/8 = 1

Example 6: Example 6: Large Improper Fraction

Problem: Convert 23/6 to a mixed number.


Solution:

Step 1: 23 ÷ 6 = 3 remainder 5.

Step 2: Mixed number = 3 5/6.

Answer: 23/6 = 3 5/6

Example 7: Example 7: Word Problem

Problem: Aditi baked 13 chapatis. She arranged them in groups of 4 on each plate. How many full plates did she fill, and how many chapatis were left over? Write as a mixed number.


Solution:

Step 1: Total chapatis = 13, chapatis per plate = 4.

Step 2: 13 ÷ 4 = 3 remainder 1.

Step 3: Mixed number = 3 1/4 plates.

Answer: Aditi filled 3 full plates with 1 chapati left over (3 1/4 plates).

Example 8: Example 8: Convert and Compare

Problem: Which is greater: 2 1/3 or 9/4?


Solution:

Step 1: Convert both to improper fractions: 2 1/3 = 7/3, 9/4 stays as 9/4.

Step 2: Cross multiply: 7 × 4 = 28 and 3 × 9 = 27.

Step 3: 28 > 27.

Answer: 2 1/3 (= 7/3) > 9/4

Example 9: Example 9: Word Problem

Problem: Rahul has 3 1/2 litres of milk. Write this as an improper fraction.


Solution:

Step 1: 3 × 2 = 6.

Step 2: 6 + 1 = 7.

Step 3: 7/2.

Answer: 3 1/2 litres = 7/2 litres

Key Points to Remember

  • An improper fraction has a numerator ≥ denominator.
  • A mixed number = whole number + proper fraction.
  • To convert improper to mixed: divide numerator by denominator. Quotient is the whole part, remainder is the new numerator.
  • To convert mixed to improper: (whole × denominator) + numerator, all over the same denominator.
  • Both forms represent the same value.
  • Mixed numbers are easier to understand in real life; improper fractions are easier for calculations.

Practice Problems

  1. Convert 15/4 to a mixed number.
  2. Convert 3 2/5 to an improper fraction.
  3. Convert 19/6 to a mixed number.
  4. Convert 5 3/8 to an improper fraction.
  5. Priya cut 10 equal pieces of a ribbon that was 3 metres long. She used 7 pieces. Express the amount used as a mixed number.
  6. Which is greater: 2 1/4 or 11/5? Convert and compare.
  7. Convert 20/7 to a mixed number and then back to an improper fraction to verify.

Frequently Asked Questions

Q1. What is an improper fraction?

An improper fraction is a fraction where the numerator is greater than or equal to the denominator. It represents a value of 1 or more. Examples: 5/3, 8/5, 9/9.

Q2. What is a mixed number?

A mixed number consists of a whole number and a proper fraction written together. It represents a value greater than 1. Example: 2 3/4 means 2 whole parts and 3/4 of another part.

Q3. How do you convert an improper fraction to a mixed number?

Divide the numerator by the denominator. The quotient is the whole number. The remainder becomes the new numerator, and the denominator stays the same. Example: 11/3 = 3 remainder 2 = 3 2/3.

Q4. How do you convert a mixed number to an improper fraction?

Multiply the whole number by the denominator, add the numerator, and write the result over the same denominator. Example: 2 1/4 = (2 x 4 + 1)/4 = 9/4.

Q5. Which form is better: improper fraction or mixed number?

Mixed numbers are easier to understand in daily life (like 2 1/2 litres of milk). Improper fractions are often easier to work with in calculations like addition and multiplication.

Q6. Is 5/5 a proper or improper fraction?

5/5 is an improper fraction because the numerator equals the denominator. It equals exactly 1.

Q7. Can a mixed number have 0 as the fractional part?

If the fractional part is 0, the mixed number is just a whole number. For example, 12/4 = 3 remainder 0 = 3 (not 3 0/4).

Q8. How do you compare mixed numbers?

First compare the whole number parts. If they are the same, compare the fractional parts. Alternatively, convert both to improper fractions and use cross multiplication.

Q9. Is this topic in the NCERT Class 4 syllabus?

Yes. Mixed numbers and improper fractions are covered in Class 4 under the Fractions chapter. Students learn to convert between the two forms and use them in word problems.

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