What is 9/49 plus 12/21? (Answer: 37/49)

Exact Answer

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Problem: What is 9/49 plus 12/21?
Formula / Expression: 9/49 + 12/21
Final Answer: 37/49
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 49 and 21 share a common factor (GCD = 7). Finding their Least Common Multiple gives an LCD of 147 (which is smaller than their product 49 × 21 = 1029, keeping the calculation simpler).
Working: LCD(49, 21) = 147

Step 2: Convert to Equivalent Fractions with Common Denominator 147
Multiply the numerator and denominator of 9/49 by 3, and multiply the numerator and denominator of 12/21 by 7 so both fractions share the common base 147.
Working: 9 × 3/49 × 3 = 27/147 and 12 × 7/21 × 7 = 84/147

Step 3: Add the Numerators
Now add the numerators (27 + 84 = 111) and keep the common denominator 147 unchanged.
Working: 27 + 84/147 = 111/147

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 111 and 147, which is 3. Divide both the numerator and denominator by 3.
Working: 111 ÷ 3/147 ÷ 3 = 37/49

Step 5: Decimal & Percentage Representation
Dividing the numerator 37 by denominator 49 produces a repeating decimal (approximately 0.755102, or 75.5102%).
Working: 37 ÷ 49 = 0.755102 (75.5102%)

Key Values:
- Simplified Fraction: 37/49
- Mixed Number Form: 37/49
- Decimal Value: 0.755102
- Percentage: 75.5102%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-9-49-plus-12-21/
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9/49 + 12/21 = 37/49

Simplified Fraction

37/49

Mixed Number

Proper (37/49)

Decimal Value

0.755102

Percentage

75.5102%

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Step-by-Step Solution: 9/49 + 12/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 49 and 21 share a common factor (GCD = 7). Finding their Least Common Multiple gives an LCD of 147 (which is smaller than their product 49 × 21 = 1029, keeping the calculation simpler).

LCD(49, 21) = 147

Step 2

Convert to Equivalent Fractions with Common Denominator 147

Multiply the numerator and denominator of 9/49 by 3, and multiply the numerator and denominator of 12/21 by 7 so both fractions share the common base 147.

9 × 3/49 × 3 = 27/147 and 12 × 7/21 × 7 = 84/147

Step 3

Add the Numerators

Now add the numerators (27 + 84 = 111) and keep the common denominator 147 unchanged.

27 + 84/147 = 111/147

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 111 and 147, which is 3. Divide both the numerator and denominator by 3.

111 ÷ 3/147 ÷ 3 = 37/49

Step 5

Decimal & Percentage Representation

Dividing the numerator 37 by denominator 49 produces a repeating decimal (approximately 0.755102, or 75.5102%).

37 ÷ 49 = 0.755102 (75.5102%)

Visual Representation

The diagram below illustrates 9/49 plus 12/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`37/49`
Mixed Number Form	`37/49`
Decimal Form	`0.755102`
Percentage	`75.5102%`

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Frequently Asked Questions

What is 9/49 plus 12/21 as a fraction?

9/49 + 12/21 in simplest fraction form is 37/49.

What is 9/49 plus 12/21 as a decimal?

9/49 + 12/21 converted to a decimal is 0.755102.

What is 9/49 plus 12/21 as a percentage?

9/49 + 12/21 expressed as a percentage is 75.5102%.

Does 9/49 plus 12/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.755102...) because the denominator contains prime factors other than 2 and 5.