What is 4/30 plus 6/21? (Answer: 44/105)

Exact Answer

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Problem: What is 4/30 plus 6/21?
Formula / Expression: 4/30 + 6/21
Final Answer: 44/105
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 30 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 210 (which is smaller than their product 30 × 21 = 630, keeping the calculation simpler).
Working: LCD(30, 21) = 210

Step 2: Convert to Equivalent Fractions with Common Denominator 210
Multiply the numerator and denominator of 4/30 by 7, and multiply the numerator and denominator of 6/21 by 10 so both fractions share the common base 210.
Working: 4 × 7/30 × 7 = 28/210 and 6 × 10/21 × 10 = 60/210

Step 3: Add the Numerators
Now add the numerators (28 + 60 = 88) and keep the common denominator 210 unchanged.
Working: 28 + 60/210 = 88/210

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 88 and 210, which is 2. Divide both the numerator and denominator by 2.
Working: 88 ÷ 2/210 ÷ 2 = 44/105

Step 5: Decimal & Percentage Representation
Dividing the numerator 44 by denominator 105 produces a repeating decimal (approximately 0.419048, or 41.9048%).
Working: 44 ÷ 105 = 0.419048 (41.9048%)

Key Values:
- Simplified Fraction: 44/105
- Mixed Number Form: 44/105
- Decimal Value: 0.419048
- Percentage: 41.9048%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-4-30-plus-6-21/
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4/30 + 6/21 = 44/105

Simplified Fraction

44/105

Mixed Number

Proper (44/105)

Decimal Value

0.419048

Percentage

41.9048%

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Step-by-Step Solution: 4/30 + 6/21

Step 1

Find the Least Common Denominator (LCD)

The denominators 30 and 21 share a common factor (GCD = 3). Finding their Least Common Multiple gives an LCD of 210 (which is smaller than their product 30 × 21 = 630, keeping the calculation simpler).

LCD(30, 21) = 210

Step 2

Convert to Equivalent Fractions with Common Denominator 210

Multiply the numerator and denominator of 4/30 by 7, and multiply the numerator and denominator of 6/21 by 10 so both fractions share the common base 210.

4 × 7/30 × 7 = 28/210 and 6 × 10/21 × 10 = 60/210

Step 3

Add the Numerators

Now add the numerators (28 + 60 = 88) and keep the common denominator 210 unchanged.

28 + 60/210 = 88/210

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 88 and 210, which is 2. Divide both the numerator and denominator by 2.

88 ÷ 2/210 ÷ 2 = 44/105

Step 5

Decimal & Percentage Representation

Dividing the numerator 44 by denominator 105 produces a repeating decimal (approximately 0.419048, or 41.9048%).

44 ÷ 105 = 0.419048 (41.9048%)

Visual Representation

The diagram below illustrates 4/30 plus 6/21 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`44/105`
Mixed Number Form	`44/105`
Decimal Form	`0.419048`
Percentage	`41.9048%`

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Frequently Asked Questions

What is 4/30 plus 6/21 as a fraction?

4/30 + 6/21 in simplest fraction form is 44/105.

What is 4/30 plus 6/21 as a decimal?

4/30 + 6/21 converted to a decimal is 0.419048.

What is 4/30 plus 6/21 as a percentage?

4/30 + 6/21 expressed as a percentage is 41.9048%.

Does 4/30 plus 6/21 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.419048...) because the denominator contains prime factors other than 2 and 5.