What is 1/4 plus 2/5? Here we will show you how to calculate 1/4 plus 2/5. We will give you the answer in fraction form and in decimal form.

We label the numbers in 1/4 plus 2/5 like this:

1/4 + 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 1/4 plus 2/5 into the formula above, we get:

(1x5 + 4x2) / 4x5
(5 + 8) / 20
13/20

Thus, the answer to 1/4 plus 2/5 (simplified if necessary) in fraction form is as follows:

13/20

To get the answer to 1/4 plus 2/5 in decimal form, we simply divide the numerator by the denominator from our fraction answer:

13 / 20 = 0.65

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

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