What is 15/26 plus 9/13? (Answer: 33/26)

Exact Answer

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Problem: What is 15/26 plus 9/13?
Formula / Expression: 15/26 + 9/13
Final Answer: 1 7/26 (33/26)
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
Notice that 26 is an exact multiple of 13 (13 × 2 = 26). The Least Common Denominator (LCD) is simply 26, meaning we only need to scale one fraction.
Working: LCD(26, 13) = 26

Step 2: Convert to Equivalent Fractions with Common Denominator 26
Multiply the numerator and denominator of 15/26 by 1, and multiply the numerator and denominator of 9/13 by 2 so both fractions share the common base 26.
Working: 15 × 1/26 × 1 = 15/26 and 9 × 2/13 × 2 = 18/26

Step 3: Add the Numerators
Now add the numerators (15 + 18 = 33) and keep the common denominator 26 unchanged.
Working: 15 + 18/26 = 33/26

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 33 and 26 is 1, confirming that 33/26 cannot be reduced further—it is already in its simplest irreducible form.
Working: 33/26

Step 5: Convert Improper Fraction to a Mixed Number
Since the numerator (33) is greater than the denominator (26), divide 33 by 26: it goes in 1 whole time(s) with a remainder of 7, giving the mixed number 1 7/26.
Working: 33/26 = 1 7/26

Step 6: Decimal & Percentage Representation
Dividing the numerator 33 by denominator 26 produces a repeating decimal (approximately 1.269231, or 126.9231%).
Working: 33 ÷ 26 = 1.269231 (126.9231%)

Key Values:
- Simplified Fraction: 33/26
- Mixed Number Form: 1 7/26
- Decimal Value: 1.269231
- Percentage: 126.9231%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-15-26-plus-9-13/
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15/26 + 9/13 = 33/26

Simplified Fraction

33/26

Mixed Number

1 7/26

Decimal Value

1.269231

Percentage

126.9231%

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Step-by-Step Solution: 15/26 + 9/13

Step 1

Find the Least Common Denominator (LCD)

Notice that 26 is an exact multiple of 13 (13 × 2 = 26). The Least Common Denominator (LCD) is simply 26, meaning we only need to scale one fraction.

LCD(26, 13) = 26

Step 2

Convert to Equivalent Fractions with Common Denominator 26

Multiply the numerator and denominator of 15/26 by 1, and multiply the numerator and denominator of 9/13 by 2 so both fractions share the common base 26.

15 × 1/26 × 1 = 15/26 and 9 × 2/13 × 2 = 18/26

Step 3

Add the Numerators

Now add the numerators (15 + 18 = 33) and keep the common denominator 26 unchanged.

15 + 18/26 = 33/26

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 33 and 26 is 1, confirming that 33/26 cannot be reduced further—it is already in its simplest irreducible form.

33/26

Step 5

Convert Improper Fraction to a Mixed Number

Since the numerator (33) is greater than the denominator (26), divide 33 by 26: it goes in 1 whole time(s) with a remainder of 7, giving the mixed number 1 7/26.

33/26 = 17/26

Step 6

Decimal & Percentage Representation

Dividing the numerator 33 by denominator 26 produces a repeating decimal (approximately 1.269231, or 126.9231%).

33 ÷ 26 = 1.269231 (126.9231%)

Visual Representation

The diagram below illustrates 15/26 plus 9/13 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`33/26`
Mixed Number Form	`1 7/26`
Decimal Form	`1.269231`
Percentage	`126.9231%`

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Frequently Asked Questions

What is 15/26 plus 9/13 as a fraction?

15/26 + 9/13 in simplest fraction form is 33/26 (or 1 7/26 as a mixed number).

What is 15/26 plus 9/13 as a decimal?

15/26 + 9/13 converted to a decimal is 1.269231.

What is 15/26 plus 9/13 as a percentage?

15/26 + 9/13 expressed as a percentage is 126.9231%.

How do you write 15/26 plus 9/13 as a mixed number?

Because the numerator is greater than the denominator, the improper fraction 33/26 can be written as the mixed number 1 7/26.

Does 15/26 plus 9/13 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 1.269231...) because the denominator contains prime factors other than 2 and 5.