What is 2/12 plus 7/9? (Answer: 17/18)

Exact Answer

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Problem: What is 2/12 plus 7/9?
Formula / Expression: 2/12 + 7/9
Final Answer: 17/18
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 12 and 9 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 36 (which is smaller than their product 12 × 9 = 108, keeping the calculation simpler).
Working: LCD(12, 9) = 36

Step 2: Convert to Equivalent Fractions with Common Denominator 36
Multiply the numerator and denominator of 2/12 by 3, and multiply the numerator and denominator of 7/9 by 4 so both fractions share the common base 36.
Working: 2 × 3/12 × 3 = 6/36 and 7 × 4/9 × 4 = 28/36

Step 3: Add the Numerators
Now add the numerators (6 + 28 = 34) and keep the common denominator 36 unchanged.
Working: 6 + 28/36 = 34/36

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 34 and 36, which is 2. Divide both the numerator and denominator by 2.
Working: 34 ÷ 2/36 ÷ 2 = 17/18

Step 5: Decimal & Percentage Representation
Dividing the numerator 17 by denominator 18 produces a repeating decimal (approximately 0.944444, or 94.4444%).
Working: 17 ÷ 18 = 0.944444 (94.4444%)

Key Values:
- Simplified Fraction: 17/18
- Mixed Number Form: 17/18
- Decimal Value: 0.944444
- Percentage: 94.4444%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-12-plus-7-9/
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2/12 + 7/9 = 17/18

Simplified Fraction

17/18

Mixed Number

Proper (17/18)

Decimal Value

0.944444

Percentage

94.4444%

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Step-by-Step Solution: 2/12 + 7/9

Step 1

Find the Least Common Denominator (LCD)

The denominators 12 and 9 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 36 (which is smaller than their product 12 × 9 = 108, keeping the calculation simpler).

LCD(12, 9) = 36

Step 2

Convert to Equivalent Fractions with Common Denominator 36

Multiply the numerator and denominator of 2/12 by 3, and multiply the numerator and denominator of 7/9 by 4 so both fractions share the common base 36.

2 × 3/12 × 3 = 6/36 and 7 × 4/9 × 4 = 28/36

Step 3

Add the Numerators

Now add the numerators (6 + 28 = 34) and keep the common denominator 36 unchanged.

6 + 28/36 = 34/36

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 34 and 36, which is 2. Divide both the numerator and denominator by 2.

34 ÷ 2/36 ÷ 2 = 17/18

Step 5

Decimal & Percentage Representation

Dividing the numerator 17 by denominator 18 produces a repeating decimal (approximately 0.944444, or 94.4444%).

17 ÷ 18 = 0.944444 (94.4444%)

Visual Representation

The diagram below illustrates 2/12 plus 7/9 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`17/18`
Mixed Number Form	`17/18`
Decimal Form	`0.944444`
Percentage	`94.4444%`

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Frequently Asked Questions

What is 2/12 plus 7/9 as a fraction?

2/12 + 7/9 in simplest fraction form is 17/18.

What is 2/12 plus 7/9 as a decimal?

2/12 + 7/9 converted to a decimal is 0.944444.

What is 2/12 plus 7/9 as a percentage?

2/12 + 7/9 expressed as a percentage is 94.4444%.

Does 2/12 plus 7/9 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.944444...) because the denominator contains prime factors other than 2 and 5.