What is 3/11 plus 3/9? (Answer: 20/33)

Exact Answer

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Problem: What is 3/11 plus 3/9?
Formula / Expression: 3/11 + 3/9
Final Answer: 20/33
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 11 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 11 × 9 = 99.
Working: LCD(11, 9) = 99

Step 2: Convert to Equivalent Fractions with Common Denominator 99
Multiply the numerator and denominator of 3/11 by 9, and multiply the numerator and denominator of 3/9 by 11 so both fractions share the common base 99.
Working: 3 × 9/11 × 9 = 27/99 and 3 × 11/9 × 11 = 33/99

Step 3: Add the Numerators
Now add the numerators (27 + 33 = 60) and keep the common denominator 99 unchanged.
Working: 27 + 33/99 = 60/99

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 60 and 99, which is 3. Divide both the numerator and denominator by 3.
Working: 60 ÷ 3/99 ÷ 3 = 20/33

Step 5: Decimal & Percentage Representation
Dividing the numerator 20 by denominator 33 produces a repeating decimal (approximately 0.606061, or 60.6061%).
Working: 20 ÷ 33 = 0.606061 (60.6061%)

Key Values:
- Simplified Fraction: 20/33
- Mixed Number Form: 20/33
- Decimal Value: 0.606061
- Percentage: 60.6061%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-3-11-plus-3-9/
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3/11 + 3/9 = 20/33

Simplified Fraction

20/33

Mixed Number

Proper (20/33)

Decimal Value

0.606061

Percentage

60.6061%

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Step-by-Step Solution: 3/11 + 3/9

Step 1

Find the Least Common Denominator (LCD)

The denominators 11 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 11 × 9 = 99.

LCD(11, 9) = 99

Step 2

Convert to Equivalent Fractions with Common Denominator 99

Multiply the numerator and denominator of 3/11 by 9, and multiply the numerator and denominator of 3/9 by 11 so both fractions share the common base 99.

3 × 9/11 × 9 = 27/99 and 3 × 11/9 × 11 = 33/99

Step 3

Add the Numerators

Now add the numerators (27 + 33 = 60) and keep the common denominator 99 unchanged.

27 + 33/99 = 60/99

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 60 and 99, which is 3. Divide both the numerator and denominator by 3.

60 ÷ 3/99 ÷ 3 = 20/33

Step 5

Decimal & Percentage Representation

Dividing the numerator 20 by denominator 33 produces a repeating decimal (approximately 0.606061, or 60.6061%).

20 ÷ 33 = 0.606061 (60.6061%)

Visual Representation

The diagram below illustrates 3/11 plus 3/9 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`20/33`
Mixed Number Form	`20/33`
Decimal Form	`0.606061`
Percentage	`60.6061%`

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Frequently Asked Questions

What is 3/11 plus 3/9 as a fraction?

3/11 + 3/9 in simplest fraction form is 20/33.

What is 3/11 plus 3/9 as a decimal?

3/11 + 3/9 converted to a decimal is 0.606061.

What is 3/11 plus 3/9 as a percentage?

3/11 + 3/9 expressed as a percentage is 60.6061%.

Does 3/11 plus 3/9 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.606061...) because the denominator contains prime factors other than 2 and 5.