What is 3/48 plus 12/21? (Answer: 71/112)

Exact Answer

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Problem: What is 3/48 plus 12/21?
Formula / Expression: 3/48 + 12/21
Final Answer: 71/112
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 48 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 336 (which is smaller than their product 48 × 21 = 1008, keeping the calculation simpler).
Working: LCD(48, 21) = 336

Step 2: Convert to Equivalent Fractions with Common Denominator 336
Multiply the numerator and denominator of 3/48 by 7, and multiply the numerator and denominator of 12/21 by 16 so both fractions share the common base 336.
Working: 3 × 7/48 × 7 = 21/336 and 12 × 16/21 × 16 = 192/336

Step 3: Add the Numerators
Now add the numerators (21 + 192 = 213) and keep the common denominator 336 unchanged.
Working: 21 + 192/336 = 213/336

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 213 and 336, which is 3. Divide both the numerator and denominator by 3.
Working: 213 ÷ 3/336 ÷ 3 = 71/112

Step 5: Decimal & Percentage Representation
Dividing the numerator 71 by denominator 112 produces a repeating decimal (approximately 0.633929, or 63.3929%).
Working: 71 ÷ 112 = 0.633929 (63.3929%)

Key Values:
- Simplified Fraction: 71/112
- Mixed Number Form: 71/112
- Decimal Value: 0.633929
- Percentage: 63.3929%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-3-48-plus-12-21/
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3/48 + 12/21 = 71/112

Simplified Fraction

71/112

Mixed Number

Proper (71/112)

Decimal Value

0.633929

Percentage

63.3929%

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Step-by-Step Solution: 3/48 + 12/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 48 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 336 (which is smaller than their product 48 × 21 = 1008, keeping the calculation simpler).

LCD(48, 21) = 336

Step 2

Convert to Equivalent Fractions with Common Denominator 336

Multiply the numerator and denominator of 3/48 by 7, and multiply the numerator and denominator of 12/21 by 16 so both fractions share the common base 336.

3 × 7/48 × 7 = 21/336 and 12 × 16/21 × 16 = 192/336

Step 3

Add the Numerators

Now add the numerators (21 + 192 = 213) and keep the common denominator 336 unchanged.

21 + 192/336 = 213/336

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 213 and 336, which is 3. Divide both the numerator and denominator by 3.

213 ÷ 3/336 ÷ 3 = 71/112

Step 5

Decimal & Percentage Representation

Dividing the numerator 71 by denominator 112 produces a repeating decimal (approximately 0.633929, or 63.3929%).

71 ÷ 112 = 0.633929 (63.3929%)

Visual Representation

The diagram below illustrates 3/48 plus 12/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`71/112`
Mixed Number Form	`71/112`
Decimal Form	`0.633929`
Percentage	`63.3929%`

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Frequently Asked Questions

What is 3/48 plus 12/21 as a fraction?

3/48 + 12/21 in simplest fraction form is 71/112.

What is 3/48 plus 12/21 as a decimal?

3/48 + 12/21 converted to a decimal is 0.633929.

What is 3/48 plus 12/21 as a percentage?

3/48 + 12/21 expressed as a percentage is 63.3929%.

Does 3/48 plus 12/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.633929...) because the denominator contains prime factors other than 2 and 5.