What is 2/8 plus 4/9? (Answer: 25/36)

Exact Answer

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Problem: What is 2/8 plus 4/9?
Formula / Expression: 2/8 + 4/9
Final Answer: 25/36
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 8 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 8 × 9 = 72.
Working: LCD(8, 9) = 72

Step 2: Convert to Equivalent Fractions with Common Denominator 72
Multiply the numerator and denominator of 2/8 by 9, and multiply the numerator and denominator of 4/9 by 8 so both fractions share the common base 72.
Working: 2 × 9/8 × 9 = 18/72 and 4 × 8/9 × 8 = 32/72

Step 3: Add the Numerators
Now add the numerators (18 + 32 = 50) and keep the common denominator 72 unchanged.
Working: 18 + 32/72 = 50/72

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 50 and 72, which is 2. Divide both the numerator and denominator by 2.
Working: 50 ÷ 2/72 ÷ 2 = 25/36

Step 5: Decimal & Percentage Representation
Dividing the numerator 25 by denominator 36 produces a repeating decimal (approximately 0.694444, or 69.4444%).
Working: 25 ÷ 36 = 0.694444 (69.4444%)

Key Values:
- Simplified Fraction: 25/36
- Mixed Number Form: 25/36
- Decimal Value: 0.694444
- Percentage: 69.4444%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-8-plus-4-9/
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2/8 + 4/9 = 25/36

Simplified Fraction

25/36

Mixed Number

Proper (25/36)

Decimal Value

0.694444

Percentage

69.4444%

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Step-by-Step Solution: 2/8 + 4/9

Step 1

Find the Least Common Denominator (LCD)

The denominators 8 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 8 × 9 = 72.

LCD(8, 9) = 72

Step 2

Convert to Equivalent Fractions with Common Denominator 72

Multiply the numerator and denominator of 2/8 by 9, and multiply the numerator and denominator of 4/9 by 8 so both fractions share the common base 72.

2 × 9/8 × 9 = 18/72 and 4 × 8/9 × 8 = 32/72

Step 3

Add the Numerators

Now add the numerators (18 + 32 = 50) and keep the common denominator 72 unchanged.

18 + 32/72 = 50/72

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 50 and 72, which is 2. Divide both the numerator and denominator by 2.

50 ÷ 2/72 ÷ 2 = 25/36

Step 5

Decimal & Percentage Representation

Dividing the numerator 25 by denominator 36 produces a repeating decimal (approximately 0.694444, or 69.4444%).

25 ÷ 36 = 0.694444 (69.4444%)

Visual Representation

The diagram below illustrates 2/8 plus 4/9 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`25/36`
Mixed Number Form	`25/36`
Decimal Form	`0.694444`
Percentage	`69.4444%`

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Frequently Asked Questions

What is 2/8 plus 4/9 as a fraction?

2/8 + 4/9 in simplest fraction form is 25/36.

What is 2/8 plus 4/9 as a decimal?

2/8 + 4/9 converted to a decimal is 0.694444.

What is 2/8 plus 4/9 as a percentage?

2/8 + 4/9 expressed as a percentage is 69.4444%.

Does 2/8 plus 4/9 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.694444...) because the denominator contains prime factors other than 2 and 5.