What is 1/2 plus 2/5?

Here we will show you how to calculate 1/2 plus 2/5. We will give you the answer in fraction form and in decimal form.

We label the numbers in 1/2 plus 2/5 like this:

1/2 + 2/5 = A/B + C/D

We will use an adding fractions formula that does not require you to find the lowest common denominator to get the answer. The adding fractions formula is:

(AD + BC) / BD

When we fill in 1/2 plus 2/5 into the formula above, we get:

(1x5 + 2x2) / 2x5
(5 + 4) / 10
9/10

Thus, the answer to 1/2 plus 2/5 (simplified if necessary) in fraction form is as follows:

9/10

To get the answer to 1/2 plus 2/5 in decimal form, we simply divide the numerator by the denominator from our fraction answer:

9 / 10 = 0.9

Adding Fractions Calculator
You can enter another adding fractions problem for us to explain and solve:

What is 1/2 plus 2/6?
Here are the next fractions on our list that we have added together so you can learn how to add fractions.