What is 1/7 plus 2/8?
What is 1/7 plus 2/8?
Answer
As a decimal: ≈ 0.3929
11/28 is the result of adding 1/7 and 2/8.
Steps to add 1/7 and 2/8
Only parts of the same size can be counted together, so 1/7 + 2/8 is solved by giving both fractions the same denominator and then adding the numerators. Here is every step.
Step 1: Simplify what can be simplified
Reducing a fraction before adding does not change the value, it only keeps the common denominator small.
2/8 = 1/4
So this is the same question as 1/7 + 1/4, and both give the same answer.
Step 2: Find the common denominator
The least common multiple of 7 and 4 is 28, so both fractions are rewritten over it.
1/7 = 4/28 (× 4)
1/4 = 7/28 (× 7)
Step 3: Add the numerators
The denominator stays as it is — it says how big each part is, and that has not changed. Only the count of parts is added up.
4/28 + 7/28
=(4 + 7)/28
=11/28
Answer
1/7 + 2/8
=11/28
As a decimal, 1/7 + 2/8 ≈ 0.3929 — the decimal form is rounded, the fraction 11/28 is the exact answer.
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See Also
- Fraction to Decimal Converter - Convert Fraction to Decimal
- Fraction Comparison Calculator - Compare two fractions and find out which is larger
- Dividing Fractions Calculator - Divide fractions, mixed numbers and whole numbers step by step
- Fraction to Mixed Number Converter - Convert an Improper Fraction to a Mixed Number
- Multiplying Fractions Calculator - Multiply fractions, mixed numbers and whole numbers step by step
- Fraction Simplifier Calculator - Simplify Fraction to its Lowest Terms
- Subtracting Fractions Calculator - Subtract fractions, mixed numbers and whole numbers step by step
- Percent to Fraction Converter - Convert Percents to Fractions
Adding Fractions Calculator
This calculator adds two fractions and shows the whole solution, not just the answer. Mixed numbers and whole numbers are accepted on both sides, so you can add 2 1/3 to 1 just as easily as 1/2 to 1/3.
For example, it can help you find out what is 1/7 plus 2/8? (The answer is: 11/28).
Enter the first fraction on the left and the second one on the right (for example '1/7' and '2/8'), then press the button.
The result is given as a fraction in its lowest terms, as a mixed number when it is greater than one, and as a decimal — with an approximation sign whenever the decimal never ends.
Every page also shows why the method works: only parts of the same size can be counted together, so both fractions are first rewritten over their least common denominator and only then are the numerators added.
Fraction Addition Table
| Addition | Result | Decimal Form |
|---|---|---|
| 1/7 + 1/12 | 19/84 | ≈ 0.2262 |
| 1/7 + 1/10 | 17/70 | ≈ 0.2429 |
| 1/7 + 1/9 | 16/63 | ≈ 0.254 |
| 1/7 + 1/8 | 15/56 | ≈ 0.2679 |
| 1/7 + 1/7 | 2/7 | ≈ 0.2857 |
| 1/7 + 1/6 | 13/42 | ≈ 0.3095 |
| 1/7 + 1/5 | 12/35 | ≈ 0.3429 |
| 1/7 + 2/9 | 23/63 | ≈ 0.3651 |
| 1/7 + 1/4 | 11/28 | ≈ 0.3929 |
| 1/7 + 2/8 | 11/28 | ≈ 0.3929 |
| 1/7 + 2/7 | 3/7 | ≈ 0.4286 |
| 1/7 + 3/10 | 31/70 | ≈ 0.4429 |
| 1/7 + 1/3 | 10/21 | ≈ 0.4762 |
| 1/7 + 3/8 | 29/56 | ≈ 0.5179 |
| 1/7 + 2/5 | 19/35 | ≈ 0.5429 |
| 1/7 + 5/12 | 47/84 | ≈ 0.5595 |
| 1/7 + 3/7 | 4/7 | ≈ 0.5714 |
| 1/7 + 1/2 | 9/14 | ≈ 0.6429 |
| 1/7 + 2/4 | 9/14 | ≈ 0.6429 |
| 1/7 + 3/5 | 26/35 | ≈ 0.7429 |
FAQ
What is 1/7 plus 2/8?
How do you add 1/7 and 2/8?
What is 1/7 plus 2/8 as a decimal?
Is 1/7 + 2/8 the same as 1/7 + 1/4?
See Also
- 1/7 plus 1/2 = 9/14
- 1/7 plus 1/3 = 10/21
- 1/7 plus 1/4 = 11/28
- 1/7 plus 1/5 = 12/35
- 1/7 plus 1/6 = 13/42
- 1/7 plus 1/7 = 2/7
- 1/7 plus 2/3 = 17/21
- 1/7 plus 2/4 = 9/14
- 1/7 plus 2/5 = 19/35
- 1/7 plus 2/7 = 3/7
- 1/7 plus 2/9 = 23/63
- 1/7 plus 3/2 = 23/14
- 1/7 plus 3/4 = 25/28
- 1/7 plus 3/5 = 26/35
- 1/7 plus 3/7 = 4/7
- 1/7 plus 3/8 = 29/56
- 1/7 plus 3/10 = 31/70
- 1/7 plus 4/5 = 33/35
- 1/7 plus 5/3 = 38/21
- 1/7 plus 5/6 = 41/42
- 1/7 плюс 2/8 = 11/28
- 1/7 más 2/8 = 11/28
- 1/7 mais 2/8 = 11/28