What is 1/5 plus 4/5? (Answer: 1)

Exact Answer

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Problem: What is 1/5 plus 4/5?
Formula / Expression: 1/5 + 4/5
Final Answer: 1
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Step-by-Step Solution:

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.
Working: 1/5 + 4/5

Step 2: Add the Numerators
Now add the numerators (1 + 4 = 5) and keep the common denominator 5 unchanged.
Working: 1 + 4/5 = 5/5

Step 3: Simplify to an Exact Whole Number
Notice that the numerator (5) is completely divisible by the denominator (5). Dividing 5 by 5 yields the whole number 1 with zero remainder.
Working: 5/5 = 1

Step 4: Decimal & Percentage Representation
Dividing the numerator 1 by denominator 1 yields an exact terminating decimal of 1 (or 100%).
Working: 1 ÷ 1 = 1 (100%)

Key Values:
- Simplified Fraction: 1
- Mixed Number Form: 1
- Decimal Value: 1
- Percentage: 100%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-1-5-plus-4-5/
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1/5 + 4/5 = 1

Simplified Fraction

Mixed Number

Decimal Value

Percentage

100%

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Step-by-Step Solution: 1/5 + 4/5

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 + 4/5

Step 2

Add the Numerators

Now add the numerators (1 + 4 = 5) and keep the common denominator 5 unchanged.

1 + 4/5 = 5/5

Step 3

Simplify to an Exact Whole Number

Notice that the numerator (5) is completely divisible by the denominator (5). Dividing 5 by 5 yields the whole number 1 with zero remainder.

5/5 = 1

Step 4

Decimal & Percentage Representation

Dividing the numerator 1 by denominator 1 yields an exact terminating decimal of 1 (or 100%).

1 ÷ 1 = 1 (100%)

Visual Representation

The diagram below illustrates 1/5 plus 4/5 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`1`
Mixed Number Form	`1`
Decimal Form	`1`
Percentage	`100%`

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Frequently Asked Questions

What is 1/5 plus 4/5 as a fraction?

1/5 + 4/5 in simplest fraction form is 1.

What is 1/5 plus 4/5 as a decimal?

1/5 + 4/5 converted to a decimal is 1.

What is 1/5 plus 4/5 as a percentage?

1/5 + 4/5 expressed as a percentage is 100%.

Is the answer to 1/5 plus 4/5 a whole number?

Yes, 1/5 + 4/5 simplifies completely to the whole number 1 with no remaining fractional part.