What is 2/9 plus 4/7? (Answer: 50/63)

Exact Answer

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Problem: What is 2/9 plus 4/7?
Formula / Expression: 2/9 + 4/7
Final Answer: 50/63
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 9 and 7 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 9 × 7 = 63.
Working: LCD(9, 7) = 63

Step 2: Convert to Equivalent Fractions with Common Denominator 63
Multiply the numerator and denominator of 2/9 by 7, and multiply the numerator and denominator of 4/7 by 9 so both fractions share the common base 63.
Working: 2 × 7/9 × 7 = 14/63 and 4 × 9/7 × 9 = 36/63

Step 3: Add the Numerators
Now add the numerators (14 + 36 = 50) and keep the common denominator 63 unchanged.
Working: 14 + 36/63 = 50/63

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 50 and 63 is 1, confirming that 50/63 cannot be reduced further—it is already in its simplest irreducible form.
Working: 50/63

Step 5: Decimal & Percentage Representation
Dividing the numerator 50 by denominator 63 produces a repeating decimal (approximately 0.793651, or 79.3651%).
Working: 50 ÷ 63 = 0.793651 (79.3651%)

Key Values:
- Simplified Fraction: 50/63
- Mixed Number Form: 50/63
- Decimal Value: 0.793651
- Percentage: 79.3651%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-9-plus-4-7/
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2/9 + 4/7 = 50/63

Simplified Fraction

50/63

Mixed Number

Proper (50/63)

Decimal Value

0.793651

Percentage

79.3651%

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Step-by-Step Solution: 2/9 + 4/7

Step 1

Find the Least Common Denominator (LCD)

The denominators 9 and 7 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 9 × 7 = 63.

LCD(9, 7) = 63

Step 2

Convert to Equivalent Fractions with Common Denominator 63

Multiply the numerator and denominator of 2/9 by 7, and multiply the numerator and denominator of 4/7 by 9 so both fractions share the common base 63.

2 × 7/9 × 7 = 14/63 and 4 × 9/7 × 9 = 36/63

Step 3

Add the Numerators

Now add the numerators (14 + 36 = 50) and keep the common denominator 63 unchanged.

14 + 36/63 = 50/63

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 50 and 63 is 1, confirming that 50/63 cannot be reduced further—it is already in its simplest irreducible form.

50/63

Step 5

Decimal & Percentage Representation

Dividing the numerator 50 by denominator 63 produces a repeating decimal (approximately 0.793651, or 79.3651%).

50 ÷ 63 = 0.793651 (79.3651%)

Visual Representation

The diagram below illustrates 2/9 plus 4/7 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`50/63`
Mixed Number Form	`50/63`
Decimal Form	`0.793651`
Percentage	`79.3651%`

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Frequently Asked Questions

What is 2/9 plus 4/7 as a fraction?

2/9 + 4/7 in simplest fraction form is 50/63.

What is 2/9 plus 4/7 as a decimal?

2/9 + 4/7 converted to a decimal is 0.793651.

What is 2/9 plus 4/7 as a percentage?

2/9 + 4/7 expressed as a percentage is 79.3651%.

Does 2/9 plus 4/7 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.793651...) because the denominator contains prime factors other than 2 and 5.