What is 5/9 plus 7/12? (Answer: 41/36)

Exact Answer

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Problem: What is 5/9 plus 7/12?
Formula / Expression: 5/9 + 7/12
Final Answer: 1 5/36 (41/36)
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Step-by-Step Solution:

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

Step 2: Convert to Equivalent Fractions with Common Denominator 36
Multiply the numerator and denominator of 5/9 by 4, and multiply the numerator and denominator of 7/12 by 3 so both fractions share the common base 36.
Working: 5 × 4/9 × 4 = 20/36 and 7 × 3/12 × 3 = 21/36

Step 3: Add the Numerators
Now add the numerators (20 + 21 = 41) and keep the common denominator 36 unchanged.
Working: 20 + 21/36 = 41/36

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 41 and 36 is 1, confirming that 41/36 cannot be reduced further—it is already in its simplest irreducible form.
Working: 41/36

Step 5: Convert Improper Fraction to a Mixed Number
Since the numerator (41) is greater than the denominator (36), divide 41 by 36: it goes in 1 whole time(s) with a remainder of 5, giving the mixed number 1 5/36.
Working: 41/36 = 1 5/36

Step 6: Decimal & Percentage Representation
Dividing the numerator 41 by denominator 36 produces a repeating decimal (approximately 1.138889, or 113.8889%).
Working: 41 ÷ 36 = 1.138889 (113.8889%)

Key Values:
- Simplified Fraction: 41/36
- Mixed Number Form: 1 5/36
- Decimal Value: 1.138889
- Percentage: 113.8889%

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Solved with FractionsCalc:
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5/9 + 7/12 = 41/36

Simplified Fraction

41/36

Mixed Number

1 5/36

Decimal Value

1.138889

Percentage

113.8889%

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Step-by-Step Solution: 5/9 + 7/12

Step 1

Find the Least Common Denominator (LCD)

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

LCD(9, 12) = 36

Step 2

Convert to Equivalent Fractions with Common Denominator 36

Multiply the numerator and denominator of 5/9 by 4, and multiply the numerator and denominator of 7/12 by 3 so both fractions share the common base 36.

5 × 4/9 × 4 = 20/36 and 7 × 3/12 × 3 = 21/36

Step 3

Add the Numerators

Now add the numerators (20 + 21 = 41) and keep the common denominator 36 unchanged.

20 + 21/36 = 41/36

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 41 and 36 is 1, confirming that 41/36 cannot be reduced further—it is already in its simplest irreducible form.

41/36

Step 5

Convert Improper Fraction to a Mixed Number

Since the numerator (41) is greater than the denominator (36), divide 41 by 36: it goes in 1 whole time(s) with a remainder of 5, giving the mixed number 1 5/36.

41/36 = 15/36

Step 6

Decimal & Percentage Representation

Dividing the numerator 41 by denominator 36 produces a repeating decimal (approximately 1.138889, or 113.8889%).

41 ÷ 36 = 1.138889 (113.8889%)

Visual Representation

The diagram below illustrates 5/9 plus 7/12 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`41/36`
Mixed Number Form	`1 5/36`
Decimal Form	`1.138889`
Percentage	`113.8889%`

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Frequently Asked Questions

What is 5/9 plus 7/12 as a fraction?

5/9 + 7/12 in simplest fraction form is 41/36 (or 1 5/36 as a mixed number).

What is 5/9 plus 7/12 as a decimal?

5/9 + 7/12 converted to a decimal is 1.138889.

What is 5/9 plus 7/12 as a percentage?

5/9 + 7/12 expressed as a percentage is 113.8889%.

How do you write 5/9 plus 7/12 as a mixed number?

Because the numerator is greater than the denominator, the improper fraction 41/36 can be written as the mixed number 1 5/36.

Does 5/9 plus 7/12 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 1.138889...) because the denominator contains prime factors other than 2 and 5.