What is 1/3 plus 3/7?

Here we will show you how to calculate 1/3 plus 3/7. We will give you the answer in fraction form and in decimal form.

We label the numbers in 1/3 plus 3/7 like this:

1/3 + 3/7 = 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 1/3 plus 3/7 into the formula above, we get:

(1x7 + 3x3) / 3x7
(7 + 9) / 21
16/21

Thus, the answer to 1/3 plus 3/7 (simplified if necessary) in fraction form is as follows:

16/21

To get the answer to 1/3 plus 3/7 in decimal form, we simply divide the numerator by the denominator from our fraction answer:

16 / 21 = 0.7619

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