What is 1/9 plus 7/9?
1/9 plus 7/9 equals 8/9 (or 0.888889 in decimal form). Learn the step-by-step solution to add 1/9 and 7/9 using Least Common Denominator and simplification.
Exact Answer
1/9 + 7/9 = 8/9
Simplified Fraction
8/9
Mixed Number
Proper (8/9)
Decimal Value
0.888889
Percentage
88.8889%
Step-by-Step Solution: 1/9 + 7/9
Step 1
Check the Denominators (Like Fractions)
Both fractions already share the identical denominator (9). Because these are like fractions, no conversion to a common denominator is required—we directly add their numerators while keeping the denominator 9.
1/9 + 7/9
Step 2
Add the Numerators
Now add the numerators (1 + 7 = 8) and keep the common denominator 9 unchanged.
1 + 7/9 = 8/9
Step 3
Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 8 and 9 is 1, confirming that 8/9 cannot be reduced further—it is already in its simplest irreducible form.
8/9
Step 4
Decimal & Percentage Representation
Dividing the numerator 8 by denominator 9 produces a repeating decimal (approximately 0.888889, or 88.8889%).
8 ÷ 9 = 0.888889 (88.8889%)
Visual Representation
The diagram below illustrates 1/9 plus 7/9 visually:
+
=
Summary & Alternative Representations
| Property / Format | Value |
|---|---|
| Lowest Terms Fraction | 8/9 |
| Mixed Number Form | 8/9 |
| Decimal Form | 0.888889 |
| Percentage | 88.8889% |
Was this solution helpful?
Help us improve our free step-by-step tools
Frequently Asked Questions
What is 1/9 plus 7/9 as a fraction?
1/9 + 7/9 in simplest fraction form is 8/9.
What is 1/9 plus 7/9 as a decimal?
1/9 + 7/9 converted to a decimal is 0.888889.
What is 1/9 plus 7/9 as a percentage?
1/9 + 7/9 expressed as a percentage is 88.8889%.
Does 1/9 plus 7/9 result in a terminating or repeating decimal?
It results in a repeating decimal (approximately 0.888889...) because the denominator contains prime factors other than 2 and 5.