What is 4/9 plus 8/15? (Answer: 44/45)

Exact Answer

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Problem: What is 4/9 plus 8/15?
Formula / Expression: 4/9 + 8/15
Final Answer: 44/45
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 9 and 15 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 45 (which is smaller than their product 9 × 15 = 135, keeping the calculation simpler).
Working: LCD(9, 15) = 45

Step 2: Convert to Equivalent Fractions with Common Denominator 45
Multiply the numerator and denominator of 4/9 by 5, and multiply the numerator and denominator of 8/15 by 3 so both fractions share the common base 45.
Working: 4 × 5/9 × 5 = 20/45 and 8 × 3/15 × 3 = 24/45

Step 3: Add the Numerators
Now add the numerators (20 + 24 = 44) and keep the common denominator 45 unchanged.
Working: 20 + 24/45 = 44/45

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 44 and 45 is 1, confirming that 44/45 cannot be reduced further—it is already in its simplest irreducible form.
Working: 44/45

Step 5: Decimal & Percentage Representation
Dividing the numerator 44 by denominator 45 produces a repeating decimal (approximately 0.977778, or 97.7778%).
Working: 44 ÷ 45 = 0.977778 (97.7778%)

Key Values:
- Simplified Fraction: 44/45
- Mixed Number Form: 44/45
- Decimal Value: 0.977778
- Percentage: 97.7778%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-4-9-plus-8-15/
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4/9 + 8/15 = 44/45

Simplified Fraction

44/45

Mixed Number

Proper (44/45)

Decimal Value

0.977778

Percentage

97.7778%

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Step-by-Step Solution: 4/9 + 8/15

Step 1

Find the Least Common Denominator (LCD)

The denominators 9 and 15 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 45 (which is smaller than their product 9 × 15 = 135, keeping the calculation simpler).

LCD(9, 15) = 45

Step 2

Convert to Equivalent Fractions with Common Denominator 45

Multiply the numerator and denominator of 4/9 by 5, and multiply the numerator and denominator of 8/15 by 3 so both fractions share the common base 45.

4 × 5/9 × 5 = 20/45 and 8 × 3/15 × 3 = 24/45

Step 3

Add the Numerators

Now add the numerators (20 + 24 = 44) and keep the common denominator 45 unchanged.

20 + 24/45 = 44/45

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 44 and 45 is 1, confirming that 44/45 cannot be reduced further—it is already in its simplest irreducible form.

44/45

Step 5

Decimal & Percentage Representation

Dividing the numerator 44 by denominator 45 produces a repeating decimal (approximately 0.977778, or 97.7778%).

44 ÷ 45 = 0.977778 (97.7778%)

Visual Representation

The diagram below illustrates 4/9 plus 8/15 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`44/45`
Mixed Number Form	`44/45`
Decimal Form	`0.977778`
Percentage	`97.7778%`

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Frequently Asked Questions

What is 4/9 plus 8/15 as a fraction?

4/9 + 8/15 in simplest fraction form is 44/45.

What is 4/9 plus 8/15 as a decimal?

4/9 + 8/15 converted to a decimal is 0.977778.

What is 4/9 plus 8/15 as a percentage?

4/9 + 8/15 expressed as a percentage is 97.7778%.

Does 4/9 plus 8/15 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.977778...) because the denominator contains prime factors other than 2 and 5.