What is 7/17 plus 2/3? (Answer: 55/51)

Exact Answer

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Problem: What is 7/17 plus 2/3?
Formula / Expression: 7/17 + 2/3
Final Answer: 1 4/51 (55/51)
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 17 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 17 × 3 = 51.
Working: LCD(17, 3) = 51

Step 2: Convert to Equivalent Fractions with Common Denominator 51
Multiply the numerator and denominator of 7/17 by 3, and multiply the numerator and denominator of 2/3 by 17 so both fractions share the common base 51.
Working: 7 × 3/17 × 3 = 21/51 and 2 × 17/3 × 17 = 34/51

Step 3: Add the Numerators
Now add the numerators (21 + 34 = 55) and keep the common denominator 51 unchanged.
Working: 21 + 34/51 = 55/51

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 55 and 51 is 1, confirming that 55/51 cannot be reduced further—it is already in its simplest irreducible form.
Working: 55/51

Step 5: Convert Improper Fraction to a Mixed Number
Since the numerator (55) is greater than the denominator (51), divide 55 by 51: it goes in 1 whole time(s) with a remainder of 4, giving the mixed number 1 4/51.
Working: 55/51 = 1 4/51

Step 6: Decimal & Percentage Representation
Dividing the numerator 55 by denominator 51 produces a repeating decimal (approximately 1.078431, or 107.8431%).
Working: 55 ÷ 51 = 1.078431 (107.8431%)

Key Values:
- Simplified Fraction: 55/51
- Mixed Number Form: 1 4/51
- Decimal Value: 1.078431
- Percentage: 107.8431%

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Solved with FractionsCalc:
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7/17 + 2/3 = 55/51

Simplified Fraction

55/51

Mixed Number

1 4/51

Decimal Value

1.078431

Percentage

107.8431%

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Step-by-Step Solution: 7/17 + 2/3

Step 1

Find the Least Common Denominator (LCD)

The denominators 17 and 3 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 17 × 3 = 51.

LCD(17, 3) = 51

Step 2

Convert to Equivalent Fractions with Common Denominator 51

Multiply the numerator and denominator of 7/17 by 3, and multiply the numerator and denominator of 2/3 by 17 so both fractions share the common base 51.

7 × 3/17 × 3 = 21/51 and 2 × 17/3 × 17 = 34/51

Step 3

Add the Numerators

Now add the numerators (21 + 34 = 55) and keep the common denominator 51 unchanged.

21 + 34/51 = 55/51

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 55 and 51 is 1, confirming that 55/51 cannot be reduced further—it is already in its simplest irreducible form.

55/51

Step 5

Convert Improper Fraction to a Mixed Number

Since the numerator (55) is greater than the denominator (51), divide 55 by 51: it goes in 1 whole time(s) with a remainder of 4, giving the mixed number 1 4/51.

55/51 = 14/51

Step 6

Decimal & Percentage Representation

Dividing the numerator 55 by denominator 51 produces a repeating decimal (approximately 1.078431, or 107.8431%).

55 ÷ 51 = 1.078431 (107.8431%)

Visual Representation

The diagram below illustrates 7/17 plus 2/3 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`55/51`
Mixed Number Form	`1 4/51`
Decimal Form	`1.078431`
Percentage	`107.8431%`

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Frequently Asked Questions

What is 7/17 plus 2/3 as a fraction?

7/17 + 2/3 in simplest fraction form is 55/51 (or 1 4/51 as a mixed number).

What is 7/17 plus 2/3 as a decimal?

7/17 + 2/3 converted to a decimal is 1.078431.

What is 7/17 plus 2/3 as a percentage?

7/17 + 2/3 expressed as a percentage is 107.8431%.

How do you write 7/17 plus 2/3 as a mixed number?

Because the numerator is greater than the denominator, the improper fraction 55/51 can be written as the mixed number 1 4/51.

Does 7/17 plus 2/3 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 1.078431...) because the denominator contains prime factors other than 2 and 5.