What is 4/15 plus 1/2? (Answer: 23/30)

Exact Answer

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Problem: What is 4/15 plus 1/2?
Formula / Expression: 4/15 + 1/2
Final Answer: 23/30
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 15 and 2 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 15 × 2 = 30.
Working: LCD(15, 2) = 30

Step 2: Convert to Equivalent Fractions with Common Denominator 30
Multiply the numerator and denominator of 4/15 by 2, and multiply the numerator and denominator of 1/2 by 15 so both fractions share the common base 30.
Working: 4 × 2/15 × 2 = 8/30 and 1 × 15/2 × 15 = 15/30

Step 3: Add the Numerators
Now add the numerators (8 + 15 = 23) and keep the common denominator 30 unchanged.
Working: 8 + 15/30 = 23/30

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 23 and 30 is 1, confirming that 23/30 cannot be reduced further—it is already in its simplest irreducible form.
Working: 23/30

Step 5: Decimal & Percentage Representation
Dividing the numerator 23 by denominator 30 produces a repeating decimal (approximately 0.766667, or 76.6667%).
Working: 23 ÷ 30 = 0.766667 (76.6667%)

Key Values:
- Simplified Fraction: 23/30
- Mixed Number Form: 23/30
- Decimal Value: 0.766667
- Percentage: 76.6667%

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Solved with FractionsCalc:
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4/15 + 1/2 = 23/30

Simplified Fraction

23/30

Mixed Number

Proper (23/30)

Decimal Value

0.766667

Percentage

76.6667%

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Step-by-Step Solution: 4/15 + 1/2

Step 1

Find the Least Common Denominator (LCD)

The denominators 15 and 2 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 15 × 2 = 30.

LCD(15, 2) = 30

Step 2

Convert to Equivalent Fractions with Common Denominator 30

Multiply the numerator and denominator of 4/15 by 2, and multiply the numerator and denominator of 1/2 by 15 so both fractions share the common base 30.

4 × 2/15 × 2 = 8/30 and 1 × 15/2 × 15 = 15/30

Step 3

Add the Numerators

Now add the numerators (8 + 15 = 23) and keep the common denominator 30 unchanged.

8 + 15/30 = 23/30

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 23 and 30 is 1, confirming that 23/30 cannot be reduced further—it is already in its simplest irreducible form.

23/30

Step 5

Decimal & Percentage Representation

Dividing the numerator 23 by denominator 30 produces a repeating decimal (approximately 0.766667, or 76.6667%).

23 ÷ 30 = 0.766667 (76.6667%)

Visual Representation

The diagram below illustrates 4/15 plus 1/2 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`23/30`
Mixed Number Form	`23/30`
Decimal Form	`0.766667`
Percentage	`76.6667%`

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Frequently Asked Questions

What is 4/15 plus 1/2 as a fraction?

4/15 + 1/2 in simplest fraction form is 23/30.

What is 4/15 plus 1/2 as a decimal?

4/15 + 1/2 converted to a decimal is 0.766667.

What is 4/15 plus 1/2 as a percentage?

4/15 + 1/2 expressed as a percentage is 76.6667%.

Does 4/15 plus 1/2 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.766667...) because the denominator contains prime factors other than 2 and 5.