What is 3/49 plus 4/21? (Answer: 37/147)

Exact Answer

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Problem: What is 3/49 plus 4/21?
Formula / Expression: 3/49 + 4/21
Final Answer: 37/147
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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 4/21 by 7 so both fractions share the common base 147.
Working: 3 × 3/49 × 3 = 9/147 and 4 × 7/21 × 7 = 28/147

Step 3: Add the Numerators
Now add the numerators (9 + 28 = 37) and keep the common denominator 147 unchanged.
Working: 9 + 28/147 = 37/147

Step 4: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 37 and 147 is 1, confirming that 37/147 cannot be reduced further—it is already in its simplest irreducible form.
Working: 37/147

Step 5: Decimal & Percentage Representation
Dividing the numerator 37 by denominator 147 produces a repeating decimal (approximately 0.251701, or 25.1701%).
Working: 37 ÷ 147 = 0.251701 (25.1701%)

Key Values:
- Simplified Fraction: 37/147
- Mixed Number Form: 37/147
- Decimal Value: 0.251701
- Percentage: 25.1701%

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Solved with FractionsCalc:
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3/49 + 4/21 = 37/147

Simplified Fraction

37/147

Mixed Number

Proper (37/147)

Decimal Value

0.251701

Percentage

25.1701%

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Step-by-Step Solution: 3/49 + 4/21

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 4/21 by 7 so both fractions share the common base 147.

3 × 3/49 × 3 = 9/147 and 4 × 7/21 × 7 = 28/147

Step 3

Add the Numerators

Now add the numerators (9 + 28 = 37) and keep the common denominator 147 unchanged.

9 + 28/147 = 37/147

Step 4

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 37 and 147 is 1, confirming that 37/147 cannot be reduced further—it is already in its simplest irreducible form.

37/147

Step 5

Decimal & Percentage Representation

Dividing the numerator 37 by denominator 147 produces a repeating decimal (approximately 0.251701, or 25.1701%).

37 ÷ 147 = 0.251701 (25.1701%)

Visual Representation

The diagram below illustrates 3/49 plus 4/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`37/147`
Mixed Number Form	`37/147`
Decimal Form	`0.251701`
Percentage	`25.1701%`

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Frequently Asked Questions

What is 3/49 plus 4/21 as a fraction?

3/49 + 4/21 in simplest fraction form is 37/147.

What is 3/49 plus 4/21 as a decimal?

3/49 + 4/21 converted to a decimal is 0.251701.

What is 3/49 plus 4/21 as a percentage?

3/49 + 4/21 expressed as a percentage is 25.1701%.

Does 3/49 plus 4/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.251701...) because the denominator contains prime factors other than 2 and 5.