What is 12/29 plus 9/13? (Answer: 417/377)

Exact Answer

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Problem: What is 12/29 plus 9/13?
Formula / Expression: 12/29 + 9/13
Final Answer: 1 40/377 (417/377)
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 29 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 29 × 13 = 377.
Working: LCD(29, 13) = 377

Step 2: Convert to Equivalent Fractions with Common Denominator 377
Multiply the numerator and denominator of 12/29 by 13, and multiply the numerator and denominator of 9/13 by 29 so both fractions share the common base 377.
Working: 12 × 13/29 × 13 = 156/377 and 9 × 29/13 × 29 = 261/377

Step 3: Add the Numerators
Now add the numerators (156 + 261 = 417) and keep the common denominator 377 unchanged.
Working: 156 + 261/377 = 417/377

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 417 and 377 is 1, confirming that 417/377 cannot be reduced further—it is already in its simplest irreducible form.
Working: 417/377

Step 5: Convert Improper Fraction to a Mixed Number
Since the numerator (417) is greater than the denominator (377), divide 417 by 377: it goes in 1 whole time(s) with a remainder of 40, giving the mixed number 1 40/377.
Working: 417/377 = 1 40/377

Step 6: Decimal & Percentage Representation
Dividing the numerator 417 by denominator 377 produces a repeating decimal (approximately 1.106101, or 110.6101%).
Working: 417 ÷ 377 = 1.106101 (110.6101%)

Key Values:
- Simplified Fraction: 417/377
- Mixed Number Form: 1 40/377
- Decimal Value: 1.106101
- Percentage: 110.6101%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-12-29-plus-9-13/
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12/29 + 9/13 = 417/377

Simplified Fraction

417/377

Mixed Number

1 40/377

Decimal Value

1.106101

Percentage

110.6101%

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Step-by-Step Solution: 12/29 + 9/13

Step 1

Find the Least Common Denominator (LCD)

The denominators 29 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 29 × 13 = 377.

LCD(29, 13) = 377

Step 2

Convert to Equivalent Fractions with Common Denominator 377

Multiply the numerator and denominator of 12/29 by 13, and multiply the numerator and denominator of 9/13 by 29 so both fractions share the common base 377.

12 × 13/29 × 13 = 156/377 and 9 × 29/13 × 29 = 261/377

Step 3

Add the Numerators

Now add the numerators (156 + 261 = 417) and keep the common denominator 377 unchanged.

156 + 261/377 = 417/377

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 417 and 377 is 1, confirming that 417/377 cannot be reduced further—it is already in its simplest irreducible form.

417/377

Step 5

Convert Improper Fraction to a Mixed Number

Since the numerator (417) is greater than the denominator (377), divide 417 by 377: it goes in 1 whole time(s) with a remainder of 40, giving the mixed number 1 40/377.

417/377 = 140/377

Step 6

Decimal & Percentage Representation

Dividing the numerator 417 by denominator 377 produces a repeating decimal (approximately 1.106101, or 110.6101%).

417 ÷ 377 = 1.106101 (110.6101%)

Visual Representation

The diagram below illustrates 12/29 plus 9/13 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`417/377`
Mixed Number Form	`1 40/377`
Decimal Form	`1.106101`
Percentage	`110.6101%`

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Frequently Asked Questions

What is 12/29 plus 9/13 as a fraction?

12/29 + 9/13 in simplest fraction form is 417/377 (or 1 40/377 as a mixed number).

What is 12/29 plus 9/13 as a decimal?

12/29 + 9/13 converted to a decimal is 1.106101.

What is 12/29 plus 9/13 as a percentage?

12/29 + 9/13 expressed as a percentage is 110.6101%.

How do you write 12/29 plus 9/13 as a mixed number?

Because the numerator is greater than the denominator, the improper fraction 417/377 can be written as the mixed number 1 40/377.

Does 12/29 plus 9/13 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 1.106101...) because the denominator contains prime factors other than 2 and 5.