What is 9/52 plus 3/13? (Answer: 21/52)

Exact Answer

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Problem: What is 9/52 plus 3/13?
Formula / Expression: 9/52 + 3/13
Final Answer: 21/52
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
Notice that 52 is an exact multiple of 13 (13 × 4 = 52). The Least Common Denominator (LCD) is simply 52, meaning we only need to scale one fraction.
Working: LCD(52, 13) = 52

Step 2: Convert to Equivalent Fractions with Common Denominator 52
Multiply the numerator and denominator of 9/52 by 1, and multiply the numerator and denominator of 3/13 by 4 so both fractions share the common base 52.
Working: 9 × 1/52 × 1 = 9/52 and 3 × 4/13 × 4 = 12/52

Step 3: Add the Numerators
Now add the numerators (9 + 12 = 21) and keep the common denominator 52 unchanged.
Working: 9 + 12/52 = 21/52

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 21 and 52 is 1, confirming that 21/52 cannot be reduced further—it is already in its simplest irreducible form.
Working: 21/52

Step 5: Decimal & Percentage Representation
Dividing the numerator 21 by denominator 52 produces a repeating decimal (approximately 0.403846, or 40.3846%).
Working: 21 ÷ 52 = 0.403846 (40.3846%)

Key Values:
- Simplified Fraction: 21/52
- Mixed Number Form: 21/52
- Decimal Value: 0.403846
- Percentage: 40.3846%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-9-52-plus-3-13/
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9/52 + 3/13 = 21/52

Simplified Fraction

21/52

Mixed Number

Proper (21/52)

Decimal Value

0.403846

Percentage

40.3846%

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Step-by-Step Solution: 9/52 + 3/13

Step 1

Find the Least Common Denominator (LCD)

Notice that 52 is an exact multiple of 13 (13 × 4 = 52). The Least Common Denominator (LCD) is simply 52, meaning we only need to scale one fraction.

LCD(52, 13) = 52

Step 2

Convert to Equivalent Fractions with Common Denominator 52

Multiply the numerator and denominator of 9/52 by 1, and multiply the numerator and denominator of 3/13 by 4 so both fractions share the common base 52.

9 × 1/52 × 1 = 9/52 and 3 × 4/13 × 4 = 12/52

Step 3

Add the Numerators

Now add the numerators (9 + 12 = 21) and keep the common denominator 52 unchanged.

9 + 12/52 = 21/52

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 21 and 52 is 1, confirming that 21/52 cannot be reduced further—it is already in its simplest irreducible form.

21/52

Step 5

Decimal & Percentage Representation

Dividing the numerator 21 by denominator 52 produces a repeating decimal (approximately 0.403846, or 40.3846%).

21 ÷ 52 = 0.403846 (40.3846%)

Visual Representation

The diagram below illustrates 9/52 plus 3/13 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`21/52`
Mixed Number Form	`21/52`
Decimal Form	`0.403846`
Percentage	`40.3846%`

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Frequently Asked Questions

What is 9/52 plus 3/13 as a fraction?

9/52 + 3/13 in simplest fraction form is 21/52.

What is 9/52 plus 3/13 as a decimal?

9/52 + 3/13 converted to a decimal is 0.403846.

What is 9/52 plus 3/13 as a percentage?

9/52 + 3/13 expressed as a percentage is 40.3846%.

Does 9/52 plus 3/13 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.403846...) because the denominator contains prime factors other than 2 and 5.