What is 2/13 plus 3/8? (Answer: 55/104)

Exact Answer

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Problem: What is 2/13 plus 3/8?
Formula / Expression: 2/13 + 3/8
Final Answer: 55/104
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 13 and 8 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 13 × 8 = 104.
Working: LCD(13, 8) = 104

Step 2: Convert to Equivalent Fractions with Common Denominator 104
Multiply the numerator and denominator of 2/13 by 8, and multiply the numerator and denominator of 3/8 by 13 so both fractions share the common base 104.
Working: 2 × 8/13 × 8 = 16/104 and 3 × 13/8 × 13 = 39/104

Step 3: Add the Numerators
Now add the numerators (16 + 39 = 55) and keep the common denominator 104 unchanged.
Working: 16 + 39/104 = 55/104

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 55 and 104 is 1, confirming that 55/104 cannot be reduced further—it is already in its simplest irreducible form.
Working: 55/104

Step 5: Decimal & Percentage Representation
Dividing the numerator 55 by denominator 104 produces a repeating decimal (approximately 0.528846, or 52.8846%).
Working: 55 ÷ 104 = 0.528846 (52.8846%)

Key Values:
- Simplified Fraction: 55/104
- Mixed Number Form: 55/104
- Decimal Value: 0.528846
- Percentage: 52.8846%

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Solved with FractionsCalc:
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2/13 + 3/8 = 55/104

Simplified Fraction

55/104

Mixed Number

Proper (55/104)

Decimal Value

0.528846

Percentage

52.8846%

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Step-by-Step Solution: 2/13 + 3/8

Step 1

Find the Least Common Denominator (LCD)

The denominators 13 and 8 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 13 × 8 = 104.

LCD(13, 8) = 104

Step 2

Convert to Equivalent Fractions with Common Denominator 104

Multiply the numerator and denominator of 2/13 by 8, and multiply the numerator and denominator of 3/8 by 13 so both fractions share the common base 104.

2 × 8/13 × 8 = 16/104 and 3 × 13/8 × 13 = 39/104

Step 3

Add the Numerators

Now add the numerators (16 + 39 = 55) and keep the common denominator 104 unchanged.

16 + 39/104 = 55/104

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 55 and 104 is 1, confirming that 55/104 cannot be reduced further—it is already in its simplest irreducible form.

55/104

Step 5

Decimal & Percentage Representation

Dividing the numerator 55 by denominator 104 produces a repeating decimal (approximately 0.528846, or 52.8846%).

55 ÷ 104 = 0.528846 (52.8846%)

Visual Representation

The diagram below illustrates 2/13 plus 3/8 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`55/104`
Mixed Number Form	`55/104`
Decimal Form	`0.528846`
Percentage	`52.8846%`

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Frequently Asked Questions

What is 2/13 plus 3/8 as a fraction?

2/13 + 3/8 in simplest fraction form is 55/104.

What is 2/13 plus 3/8 as a decimal?

2/13 + 3/8 converted to a decimal is 0.528846.

What is 2/13 plus 3/8 as a percentage?

2/13 + 3/8 expressed as a percentage is 52.8846%.

Does 2/13 plus 3/8 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.528846...) because the denominator contains prime factors other than 2 and 5.