What is 4/13 plus 5/16? (Answer: 129/208)

Exact Answer

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Problem: What is 4/13 plus 5/16?
Formula / Expression: 4/13 + 5/16
Final Answer: 129/208
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 13 and 16 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 13 × 16 = 208.
Working: LCD(13, 16) = 208

Step 2: Convert to Equivalent Fractions with Common Denominator 208
Multiply the numerator and denominator of 4/13 by 16, and multiply the numerator and denominator of 5/16 by 13 so both fractions share the common base 208.
Working: 4 × 16/13 × 16 = 64/208 and 5 × 13/16 × 13 = 65/208

Step 3: Add the Numerators
Now add the numerators (64 + 65 = 129) and keep the common denominator 208 unchanged.
Working: 64 + 65/208 = 129/208

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 129 and 208 is 1, confirming that 129/208 cannot be reduced further—it is already in its simplest irreducible form.
Working: 129/208

Step 5: Decimal & Percentage Representation
Dividing the numerator 129 by denominator 208 produces a repeating decimal (approximately 0.620192, or 62.0192%).
Working: 129 ÷ 208 = 0.620192 (62.0192%)

Key Values:
- Simplified Fraction: 129/208
- Mixed Number Form: 129/208
- Decimal Value: 0.620192
- Percentage: 62.0192%

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Solved with FractionsCalc:
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4/13 + 5/16 = 129/208

Simplified Fraction

129/208

Mixed Number

Proper (129/208)

Decimal Value

0.620192

Percentage

62.0192%

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Step-by-Step Solution: 4/13 + 5/16

Step 1

Find the Least Common Denominator (LCD)

The denominators 13 and 16 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 13 × 16 = 208.

LCD(13, 16) = 208

Step 2

Convert to Equivalent Fractions with Common Denominator 208

Multiply the numerator and denominator of 4/13 by 16, and multiply the numerator and denominator of 5/16 by 13 so both fractions share the common base 208.

4 × 16/13 × 16 = 64/208 and 5 × 13/16 × 13 = 65/208

Step 3

Add the Numerators

Now add the numerators (64 + 65 = 129) and keep the common denominator 208 unchanged.

64 + 65/208 = 129/208

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 129 and 208 is 1, confirming that 129/208 cannot be reduced further—it is already in its simplest irreducible form.

129/208

Step 5

Decimal & Percentage Representation

Dividing the numerator 129 by denominator 208 produces a repeating decimal (approximately 0.620192, or 62.0192%).

129 ÷ 208 = 0.620192 (62.0192%)

Visual Representation

The diagram below illustrates 4/13 plus 5/16 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`129/208`
Mixed Number Form	`129/208`
Decimal Form	`0.620192`
Percentage	`62.0192%`

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Frequently Asked Questions

What is 4/13 plus 5/16 as a fraction?

4/13 + 5/16 in simplest fraction form is 129/208.

What is 4/13 plus 5/16 as a decimal?

4/13 + 5/16 converted to a decimal is 0.620192.

What is 4/13 plus 5/16 as a percentage?

4/13 + 5/16 expressed as a percentage is 62.0192%.

Does 4/13 plus 5/16 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.620192...) because the denominator contains prime factors other than 2 and 5.