What is 2/7 plus 8/20? (Answer: 24/35)

Exact Answer

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Problem: What is 2/7 plus 8/20?
Formula / Expression: 2/7 + 8/20
Final Answer: 24/35
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 7 and 20 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 7 × 20 = 140.
Working: LCD(7, 20) = 140

Step 2: Convert to Equivalent Fractions with Common Denominator 140
Multiply the numerator and denominator of 2/7 by 20, and multiply the numerator and denominator of 8/20 by 7 so both fractions share the common base 140.
Working: 2 × 20/7 × 20 = 40/140 and 8 × 7/20 × 7 = 56/140

Step 3: Add the Numerators
Now add the numerators (40 + 56 = 96) and keep the common denominator 140 unchanged.
Working: 40 + 56/140 = 96/140

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 96 and 140, which is 4. Divide both the numerator and denominator by 4.
Working: 96 ÷ 4/140 ÷ 4 = 24/35

Step 5: Decimal & Percentage Representation
Dividing the numerator 24 by denominator 35 produces a repeating decimal (approximately 0.685714, or 68.5714%).
Working: 24 ÷ 35 = 0.685714 (68.5714%)

Key Values:
- Simplified Fraction: 24/35
- Mixed Number Form: 24/35
- Decimal Value: 0.685714
- Percentage: 68.5714%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-2-7-plus-8-20/
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2/7 + 8/20 = 24/35

Simplified Fraction

24/35

Mixed Number

Proper (24/35)

Decimal Value

0.685714

Percentage

68.5714%

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Step-by-Step Solution: 2/7 + 8/20

Step 1

Find the Least Common Denominator (LCD)

The denominators 7 and 20 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 7 × 20 = 140.

LCD(7, 20) = 140

Step 2

Convert to Equivalent Fractions with Common Denominator 140

Multiply the numerator and denominator of 2/7 by 20, and multiply the numerator and denominator of 8/20 by 7 so both fractions share the common base 140.

2 × 20/7 × 20 = 40/140 and 8 × 7/20 × 7 = 56/140

Step 3

Add the Numerators

Now add the numerators (40 + 56 = 96) and keep the common denominator 140 unchanged.

40 + 56/140 = 96/140

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 96 and 140, which is 4. Divide both the numerator and denominator by 4.

96 ÷ 4/140 ÷ 4 = 24/35

Step 5

Decimal & Percentage Representation

Dividing the numerator 24 by denominator 35 produces a repeating decimal (approximately 0.685714, or 68.5714%).

24 ÷ 35 = 0.685714 (68.5714%)

Visual Representation

The diagram below illustrates 2/7 plus 8/20 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`24/35`
Mixed Number Form	`24/35`
Decimal Form	`0.685714`
Percentage	`68.5714%`

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Frequently Asked Questions

What is 2/7 plus 8/20 as a fraction?

2/7 + 8/20 in simplest fraction form is 24/35.

What is 2/7 plus 8/20 as a decimal?

2/7 + 8/20 converted to a decimal is 0.685714.

What is 2/7 plus 8/20 as a percentage?

2/7 + 8/20 expressed as a percentage is 68.5714%.

Does 2/7 plus 8/20 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.685714...) because the denominator contains prime factors other than 2 and 5.