What is 13/36 plus 7/13? (Answer: 421/468)

Exact Answer

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Problem: What is 13/36 plus 7/13?
Formula / Expression: 13/36 + 7/13
Final Answer: 421/468
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 36 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 36 × 13 = 468.
Working: LCD(36, 13) = 468

Step 2: Convert to Equivalent Fractions with Common Denominator 468
Multiply the numerator and denominator of 13/36 by 13, and multiply the numerator and denominator of 7/13 by 36 so both fractions share the common base 468.
Working: 13 × 13/36 × 13 = 169/468 and 7 × 36/13 × 36 = 252/468

Step 3: Add the Numerators
Now add the numerators (169 + 252 = 421) and keep the common denominator 468 unchanged.
Working: 169 + 252/468 = 421/468

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 421 and 468 is 1, confirming that 421/468 cannot be reduced further—it is already in its simplest irreducible form.
Working: 421/468

Step 5: Decimal & Percentage Representation
Dividing the numerator 421 by denominator 468 produces a repeating decimal (approximately 0.899573, or 89.9573%).
Working: 421 ÷ 468 = 0.899573 (89.9573%)

Key Values:
- Simplified Fraction: 421/468
- Mixed Number Form: 421/468
- Decimal Value: 0.899573
- Percentage: 89.9573%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-13-36-plus-7-13/
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13/36 + 7/13 = 421/468

Simplified Fraction

421/468

Mixed Number

Proper (421/468)

Decimal Value

0.899573

Percentage

89.9573%

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Step-by-Step Solution: 13/36 + 7/13

Step 1

Find the Least Common Denominator (LCD)

The denominators 36 and 13 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 36 × 13 = 468.

LCD(36, 13) = 468

Step 2

Convert to Equivalent Fractions with Common Denominator 468

Multiply the numerator and denominator of 13/36 by 13, and multiply the numerator and denominator of 7/13 by 36 so both fractions share the common base 468.

13 × 13/36 × 13 = 169/468 and 7 × 36/13 × 36 = 252/468

Step 3

Add the Numerators

Now add the numerators (169 + 252 = 421) and keep the common denominator 468 unchanged.

169 + 252/468 = 421/468

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 421 and 468 is 1, confirming that 421/468 cannot be reduced further—it is already in its simplest irreducible form.

421/468

Step 5

Decimal & Percentage Representation

Dividing the numerator 421 by denominator 468 produces a repeating decimal (approximately 0.899573, or 89.9573%).

421 ÷ 468 = 0.899573 (89.9573%)

Visual Representation

The diagram below illustrates 13/36 plus 7/13 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`421/468`
Mixed Number Form	`421/468`
Decimal Form	`0.899573`
Percentage	`89.9573%`

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Frequently Asked Questions

What is 13/36 plus 7/13 as a fraction?

13/36 + 7/13 in simplest fraction form is 421/468.

What is 13/36 plus 7/13 as a decimal?

13/36 + 7/13 converted to a decimal is 0.899573.

What is 13/36 plus 7/13 as a percentage?

13/36 + 7/13 expressed as a percentage is 89.9573%.

Does 13/36 plus 7/13 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.899573...) because the denominator contains prime factors other than 2 and 5.