What is 14/49 plus 10/21? (Answer: 16/21)

Exact Answer

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Problem: What is 14/49 plus 10/21?
Formula / Expression: 14/49 + 10/21
Final Answer: 16/21
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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 14/49 by 3, and multiply the numerator and denominator of 10/21 by 7 so both fractions share the common base 147.
Working: 14 × 3/49 × 3 = 42/147 and 10 × 7/21 × 7 = 70/147

Step 3: Add the Numerators
Now add the numerators (42 + 70 = 112) and keep the common denominator 147 unchanged.
Working: 42 + 70/147 = 112/147

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 112 and 147, which is 7. Divide both the numerator and denominator by 7.
Working: 112 ÷ 7/147 ÷ 7 = 16/21

Step 5: Decimal & Percentage Representation
Dividing the numerator 16 by denominator 21 produces a repeating decimal (approximately 0.761905, or 76.1905%).
Working: 16 ÷ 21 = 0.761905 (76.1905%)

Key Values:
- Simplified Fraction: 16/21
- Mixed Number Form: 16/21
- Decimal Value: 0.761905
- Percentage: 76.1905%

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Solved with FractionsCalc:
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14/49 + 10/21 = 16/21

Simplified Fraction

16/21

Mixed Number

Proper (16/21)

Decimal Value

0.761905

Percentage

76.1905%

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Step-by-Step Solution: 14/49 + 10/21

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 14/49 by 3, and multiply the numerator and denominator of 10/21 by 7 so both fractions share the common base 147.

14 × 3/49 × 3 = 42/147 and 10 × 7/21 × 7 = 70/147

Step 3

Add the Numerators

Now add the numerators (42 + 70 = 112) and keep the common denominator 147 unchanged.

42 + 70/147 = 112/147

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 112 and 147, which is 7. Divide both the numerator and denominator by 7.

112 ÷ 7/147 ÷ 7 = 16/21

Step 5

Decimal & Percentage Representation

Dividing the numerator 16 by denominator 21 produces a repeating decimal (approximately 0.761905, or 76.1905%).

16 ÷ 21 = 0.761905 (76.1905%)

Visual Representation

The diagram below illustrates 14/49 plus 10/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`16/21`
Mixed Number Form	`16/21`
Decimal Form	`0.761905`
Percentage	`76.1905%`

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Frequently Asked Questions

What is 14/49 plus 10/21 as a fraction?

14/49 + 10/21 in simplest fraction form is 16/21.

What is 14/49 plus 10/21 as a decimal?

14/49 + 10/21 converted to a decimal is 0.761905.

What is 14/49 plus 10/21 as a percentage?

14/49 + 10/21 expressed as a percentage is 76.1905%.

Does 14/49 plus 10/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.761905...) because the denominator contains prime factors other than 2 and 5.