What is 1/7 plus 6/13? (Answer: 55/91)

Exact Answer

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Problem: What is 1/7 plus 6/13?
Formula / Expression: 1/7 + 6/13
Final Answer: 55/91
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 7 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 7 × 13 = 91.
Working: LCD(7, 13) = 91

Step 2: Convert to Equivalent Fractions with Common Denominator 91
Multiply the numerator and denominator of 1/7 by 13, and multiply the numerator and denominator of 6/13 by 7 so both fractions share the common base 91.
Working: 1 × 13/7 × 13 = 13/91 and 6 × 7/13 × 7 = 42/91

Step 3: Add the Numerators
Now add the numerators (13 + 42 = 55) and keep the common denominator 91 unchanged.
Working: 13 + 42/91 = 55/91

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 55 and 91 is 1, confirming that 55/91 cannot be reduced further—it is already in its simplest irreducible form.
Working: 55/91

Step 5: Decimal & Percentage Representation
Dividing the numerator 55 by denominator 91 produces a repeating decimal (approximately 0.604396, or 60.4396%).
Working: 55 ÷ 91 = 0.604396 (60.4396%)

Key Values:
- Simplified Fraction: 55/91
- Mixed Number Form: 55/91
- Decimal Value: 0.604396
- Percentage: 60.4396%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-1-7-plus-6-13/
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1/7 + 6/13 = 55/91

Simplified Fraction

55/91

Mixed Number

Proper (55/91)

Decimal Value

0.604396

Percentage

60.4396%

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Step-by-Step Solution: 1/7 + 6/13

Step 1

Find the Least Common Denominator (LCD)

The denominators 7 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 7 × 13 = 91.

LCD(7, 13) = 91

Step 2

Convert to Equivalent Fractions with Common Denominator 91

Multiply the numerator and denominator of 1/7 by 13, and multiply the numerator and denominator of 6/13 by 7 so both fractions share the common base 91.

1 × 13/7 × 13 = 13/91 and 6 × 7/13 × 7 = 42/91

Step 3

Add the Numerators

Now add the numerators (13 + 42 = 55) and keep the common denominator 91 unchanged.

13 + 42/91 = 55/91

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 55 and 91 is 1, confirming that 55/91 cannot be reduced further—it is already in its simplest irreducible form.

55/91

Step 5

Decimal & Percentage Representation

Dividing the numerator 55 by denominator 91 produces a repeating decimal (approximately 0.604396, or 60.4396%).

55 ÷ 91 = 0.604396 (60.4396%)

Visual Representation

The diagram below illustrates 1/7 plus 6/13 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`55/91`
Mixed Number Form	`55/91`
Decimal Form	`0.604396`
Percentage	`60.4396%`

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Frequently Asked Questions

What is 1/7 plus 6/13 as a fraction?

1/7 + 6/13 in simplest fraction form is 55/91.

What is 1/7 plus 6/13 as a decimal?

1/7 + 6/13 converted to a decimal is 0.604396.

What is 1/7 plus 6/13 as a percentage?

1/7 + 6/13 expressed as a percentage is 60.4396%.

Does 1/7 plus 6/13 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.604396...) because the denominator contains prime factors other than 2 and 5.