What is 4/10 plus 2/5?

Here we will show you how to calculate 4/10 plus 2/5. We will give you the answer in fraction form and in decimal form.

We label the numbers in 4/10 plus 2/5 like this:

4/10 + 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 4/10 plus 2/5 into the formula above, we get:

(4x5 + 10x2) / 10x5
(20 + 20) / 50
40/50

Thus, the answer to 4/10 plus 2/5 (simplified if necessary) in fraction form is as follows:

4/5

To get the answer to 4/10 plus 2/5 in decimal form, we simply divide the numerator by the denominator from our fraction answer:

40 / 50 = 0.8

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

What is 4/10 plus 2/6?
Here are the next fractions on our list that we have added together so you can learn how to add fractions.