What is 6/49 plus 6/21? (Answer: 20/49)

Exact Answer

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Problem: What is 6/49 plus 6/21?
Formula / Expression: 6/49 + 6/21
Final Answer: 20/49
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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 6/49 by 3, and multiply the numerator and denominator of 6/21 by 7 so both fractions share the common base 147.
Working: 6 × 3/49 × 3 = 18/147 and 6 × 7/21 × 7 = 42/147

Step 3: Add the Numerators
Now add the numerators (18 + 42 = 60) and keep the common denominator 147 unchanged.
Working: 18 + 42/147 = 60/147

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 60 and 147, which is 3. Divide both the numerator and denominator by 3.
Working: 60 ÷ 3/147 ÷ 3 = 20/49

Step 5: Decimal & Percentage Representation
Dividing the numerator 20 by denominator 49 produces a repeating decimal (approximately 0.408163, or 40.8163%).
Working: 20 ÷ 49 = 0.408163 (40.8163%)

Key Values:
- Simplified Fraction: 20/49
- Mixed Number Form: 20/49
- Decimal Value: 0.408163
- Percentage: 40.8163%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-6-49-plus-6-21/
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6/49 + 6/21 = 20/49

Simplified Fraction

20/49

Mixed Number

Proper (20/49)

Decimal Value

0.408163

Percentage

40.8163%

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Step-by-Step Solution: 6/49 + 6/21

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 6/49 by 3, and multiply the numerator and denominator of 6/21 by 7 so both fractions share the common base 147.

6 × 3/49 × 3 = 18/147 and 6 × 7/21 × 7 = 42/147

Step 3

Add the Numerators

Now add the numerators (18 + 42 = 60) and keep the common denominator 147 unchanged.

18 + 42/147 = 60/147

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 60 and 147, which is 3. Divide both the numerator and denominator by 3.

60 ÷ 3/147 ÷ 3 = 20/49

Step 5

Decimal & Percentage Representation

Dividing the numerator 20 by denominator 49 produces a repeating decimal (approximately 0.408163, or 40.8163%).

20 ÷ 49 = 0.408163 (40.8163%)

Visual Representation

The diagram below illustrates 6/49 plus 6/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`20/49`
Mixed Number Form	`20/49`
Decimal Form	`0.408163`
Percentage	`40.8163%`

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Frequently Asked Questions

What is 6/49 plus 6/21 as a fraction?

6/49 + 6/21 in simplest fraction form is 20/49.

What is 6/49 plus 6/21 as a decimal?

6/49 + 6/21 converted to a decimal is 0.408163.

What is 6/49 plus 6/21 as a percentage?

6/49 + 6/21 expressed as a percentage is 40.8163%.

Does 6/49 plus 6/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.408163...) because the denominator contains prime factors other than 2 and 5.