What is 1/5 plus 2/5?
1/5 plus 2/5 equals 3/5 (or 0.6 in decimal form). Learn the step-by-step solution to add 1/5 and 2/5 using Least Common Denominator and simplification.
Exact Answer
1/5 + 2/5 = 3/5
Simplified Fraction
3/5
Mixed Number
Proper (3/5)
Decimal Value
0.6
Percentage
60%
Step-by-Step Solution: 1/5 + 2/5
Step 1
Check the Denominators (Like Fractions)
Both fractions already share the identical denominator (5). Because these are like fractions, no conversion to a common denominator is required—we directly add their numerators while keeping the denominator 5.
1/5 + 2/5
Step 2
Add the Numerators
Now add the numerators (1 + 2 = 3) and keep the common denominator 5 unchanged.
1 + 2/5 = 3/5
Step 3
Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 3 and 5 is 1, confirming that 3/5 cannot be reduced further—it is already in its simplest irreducible form.
3/5
Step 4
Decimal & Percentage Representation
Dividing the numerator 3 by denominator 5 yields an exact terminating decimal of 0.6 (or 60%).
3 ÷ 5 = 0.6 (60%)
Visual Representation
The diagram below illustrates 1/5 plus 2/5 visually:
+
=
Summary & Alternative Representations
| Property / Format | Value |
|---|---|
| Lowest Terms Fraction | 3/5 |
| Mixed Number Form | 3/5 |
| Decimal Form | 0.6 |
| Percentage | 60% |
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Frequently Asked Questions
What is 1/5 plus 2/5 as a fraction?
1/5 + 2/5 in simplest fraction form is 3/5.
What is 1/5 plus 2/5 as a decimal?
1/5 + 2/5 converted to a decimal is 0.6.
What is 1/5 plus 2/5 as a percentage?
1/5 + 2/5 expressed as a percentage is 60%.
Does 1/5 plus 2/5 result in a terminating or repeating decimal?
It results in an exact terminating decimal (0.6) because the denominator in simplest terms contains only prime factors 2 and/or 5.