What Is 2/5 + 4/5?

2/5 + 4/5 = 6/5, or 1 1/5 as a mixed number.

Result

Answer

\frac{2}{5} + \frac{4}{5} = \textcolor{#0b5c56}{\frac{6}{5} = 1\frac{1}{5}}

The sum is 6/5 in simplest form, or 1 1/5 as a mixed number.

  • Decimal: \displaystyle 1.2
  • Percent: 120%

1 whole + 1 of 5 equal parts

Step-by-step solution

The problem

\frac{2}{5} + \frac{4}{5}

  1. Add the numerators. Keep the denominator 5.

    = \frac{2 + 4}{5} = \textcolor{#0b5c56}{\frac{6}{5}}

  2. Check that it can't be simplified. 6 and 5 have no common factor other than 1, so this is the simplest form.

    \text{GCF}(6, 5) = 1

  3. Write it as a mixed number. Divide: 5 goes into 6 1 time with 1 left over. The whole number is 1, the remainder 1 becomes the numerator, and the denominator stays 5.

    6 \div 5 = 1\ \text{R}\ 1
    = \textcolor{#0b5c56}{1\frac{1}{5}}

All the working together

\begin{aligned} &\frac{2}{5} + \frac{4}{5} \\[8pt] &= \frac{2 + 4}{5} && \textcolor{#5b6660}{\textsf{add}} \\[8pt] &= \frac{6}{5} \\[8pt] &= \textcolor{#0b5c56}{1\frac{1}{5}} && \textcolor{#5b6660}{\textsf{mixed number}}\end{aligned}

The answer in other forms

Simplest form6/5
Mixed number1 1/5
Decimal1.2
Percent120%
Same fractions4/5 − 2/5, 2/5 × 4/5, 2/5 ÷ 4/5

2/5 plus other fractions

SumAnswer
2/5 + 1/29/10
2/5 + 1/311/15
2/5 + 2/316/15
2/5 + 1/413/20
2/5 + 3/423/20
2/5 + 1/53/5
2/5 + 2/54/5
2/5 + 3/51
2/5 + 4/56/5
2/5 + 1/617/30
2/5 + 5/637/30
2/5 + 1/821/40
2/5 + 3/831/40
2/5 + 5/841/40
2/5 + 7/851/40

Frequently asked questions

What is 2/5 + 4/5?

2/5 + 4/5 = 6/5 = 1 1/5 (1.2 as a decimal).

How do you add 2/5 and 4/5?

Write both over a common denominator, add the numerators and simplify. The working above shows each step.

Other fractions, mixed numbers or up to five terms: use the Fraction Calculator.