What is 4/5 plus 4/5? (Answer: 8/5)

Exact Answer

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Problem: What is 4/5 plus 4/5?
Formula / Expression: 4/5 + 4/5
Final Answer: 1 3/5 (8/5)
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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: 4/5 + 4/5

Step 2: Add the Numerators
Now add the numerators (4 + 4 = 8) and keep the common denominator 5 unchanged.
Working: 4 + 4/5 = 8/5

Step 3: Check if the Fraction Can Be Simplified
The Greatest Common Divisor (GCD) of 8 and 5 is 1, confirming that 8/5 cannot be reduced further—it is already in its simplest irreducible form.
Working: 8/5

Step 4: Convert Improper Fraction to a Mixed Number
Since the numerator (8) is greater than the denominator (5), divide 8 by 5: it goes in 1 whole time(s) with a remainder of 3, giving the mixed number 1 3/5.
Working: 8/5 = 1 3/5

Step 5: Decimal & Percentage Representation
Dividing the numerator 8 by denominator 5 yields an exact terminating decimal of 1.6 (or 160%).
Working: 8 ÷ 5 = 1.6 (160%)

Key Values:
- Simplified Fraction: 8/5
- Mixed Number Form: 1 3/5
- Decimal Value: 1.6
- Percentage: 160%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-4-5-plus-4-5/
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4/5 + 4/5 = 8/5

Simplified Fraction

8/5

Mixed Number

1 3/5

Decimal Value

1.6

Percentage

160%

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

4/5 + 4/5

Step 2

Add the Numerators

Now add the numerators (4 + 4 = 8) and keep the common denominator 5 unchanged.

4 + 4/5 = 8/5

Step 3

Check if the Fraction Can Be Simplified

The Greatest Common Divisor (GCD) of 8 and 5 is 1, confirming that 8/5 cannot be reduced further—it is already in its simplest irreducible form.

8/5

Step 4

Convert Improper Fraction to a Mixed Number

Since the numerator (8) is greater than the denominator (5), divide 8 by 5: it goes in 1 whole time(s) with a remainder of 3, giving the mixed number 1 3/5.

8/5 = 13/5

Step 5

Decimal & Percentage Representation

Dividing the numerator 8 by denominator 5 yields an exact terminating decimal of 1.6 (or 160%).

8 ÷ 5 = 1.6 (160%)

Visual Representation

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

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`8/5`
Mixed Number Form	`1 3/5`
Decimal Form	`1.6`
Percentage	`160%`

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Frequently Asked Questions

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

4/5 + 4/5 in simplest fraction form is 8/5 (or 1 3/5 as a mixed number).

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

4/5 + 4/5 converted to a decimal is 1.6.

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

4/5 + 4/5 expressed as a percentage is 160%.

How do you write 4/5 plus 4/5 as a mixed number?

Because the numerator is greater than the denominator, the improper fraction 8/5 can be written as the mixed number 1 3/5.

Does 4/5 plus 4/5 result in a terminating or repeating decimal?

It results in an exact terminating decimal (1.6) because the denominator in simplest terms contains only prime factors 2 and/or 5.