What is 3/49 plus 3/21? (Answer: 10/49)

Exact Answer

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Problem: What is 3/49 plus 3/21?
Formula / Expression: 3/49 + 3/21
Final Answer: 10/49
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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 3/49 by 3, and multiply the numerator and denominator of 3/21 by 7 so both fractions share the common base 147.
Working: 3 × 3/49 × 3 = 9/147 and 3 × 7/21 × 7 = 21/147

Step 3: Add the Numerators
Now add the numerators (9 + 21 = 30) and keep the common denominator 147 unchanged.
Working: 9 + 21/147 = 30/147

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 30 and 147, which is 3. Divide both the numerator and denominator by 3.
Working: 30 ÷ 3/147 ÷ 3 = 10/49

Step 5: Decimal & Percentage Representation
Dividing the numerator 10 by denominator 49 produces a repeating decimal (approximately 0.204082, or 20.4082%).
Working: 10 ÷ 49 = 0.204082 (20.4082%)

Key Values:
- Simplified Fraction: 10/49
- Mixed Number Form: 10/49
- Decimal Value: 0.204082
- Percentage: 20.4082%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-3-49-plus-3-21/
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3/49 + 3/21 = 10/49

Simplified Fraction

10/49

Mixed Number

Proper (10/49)

Decimal Value

0.204082

Percentage

20.4082%

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Step-by-Step Solution: 3/49 + 3/21

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

3 × 3/49 × 3 = 9/147 and 3 × 7/21 × 7 = 21/147

Step 3

Add the Numerators

Now add the numerators (9 + 21 = 30) and keep the common denominator 147 unchanged.

9 + 21/147 = 30/147

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 30 and 147, which is 3. Divide both the numerator and denominator by 3.

30 ÷ 3/147 ÷ 3 = 10/49

Step 5

Decimal & Percentage Representation

Dividing the numerator 10 by denominator 49 produces a repeating decimal (approximately 0.204082, or 20.4082%).

10 ÷ 49 = 0.204082 (20.4082%)

Visual Representation

The diagram below illustrates 3/49 plus 3/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`10/49`
Mixed Number Form	`10/49`
Decimal Form	`0.204082`
Percentage	`20.4082%`

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Frequently Asked Questions

What is 3/49 plus 3/21 as a fraction?

3/49 + 3/21 in simplest fraction form is 10/49.

What is 3/49 plus 3/21 as a decimal?

3/49 + 3/21 converted to a decimal is 0.204082.

What is 3/49 plus 3/21 as a percentage?

3/49 + 3/21 expressed as a percentage is 20.4082%.

Does 3/49 plus 3/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.204082...) because the denominator contains prime factors other than 2 and 5.