What is 1/8 plus 4/8?
1/8 plus 4/8 equals 5/8 (or 0.625 in decimal form). Learn the step-by-step solution to add 1/8 and 4/8 using Least Common Denominator and simplification.
Exact Answer
1/8 + 4/8 = 5/8
Simplified Fraction
5/8
Mixed Number
Proper (5/8)
Decimal Value
0.625
Percentage
62.5%
Step-by-Step Solution: 1/8 + 4/8
Step 1
Check the Denominators (Like Fractions)
Both fractions already share the identical denominator (8). Because these are like fractions, no conversion to a common denominator is required—we directly add their numerators while keeping the denominator 8.
1/8 + 4/8
Step 2
Add the Numerators
Now add the numerators (1 + 4 = 5) and keep the common denominator 8 unchanged.
1 + 4/8 = 5/8
Step 3
Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 5 and 8 is 1, confirming that 5/8 cannot be reduced further—it is already in its simplest irreducible form.
5/8
Step 4
Decimal & Percentage Representation
Dividing the numerator 5 by denominator 8 yields an exact terminating decimal of 0.625 (or 62.5%).
5 ÷ 8 = 0.625 (62.5%)
Visual Representation
The diagram below illustrates 1/8 plus 4/8 visually:
+
=
Summary & Alternative Representations
| Property / Format | Value |
|---|---|
| Lowest Terms Fraction | 5/8 |
| Mixed Number Form | 5/8 |
| Decimal Form | 0.625 |
| Percentage | 62.5% |
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Frequently Asked Questions
What is 1/8 plus 4/8 as a fraction?
1/8 + 4/8 in simplest fraction form is 5/8.
What is 1/8 plus 4/8 as a decimal?
1/8 + 4/8 converted to a decimal is 0.625.
What is 1/8 plus 4/8 as a percentage?
1/8 + 4/8 expressed as a percentage is 62.5%.
Does 1/8 plus 4/8 result in a terminating or repeating decimal?
It results in an exact terminating decimal (0.625) because the denominator in simplest terms contains only prime factors 2 and/or 5.