# Mixed fraction. `1 1/2 + 3/8=?`

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### 2 Answers

`1 1/2+3/8`

Note that we may re-write a mix fraction as `a b/c=a+b/c` .

`=1+1/2+3/8`

Then, let's consider adding the fractions first. Since the two fractions have unlike denominator, express them using the LCD as their denominator. The LCD of 1/2 and 3/8 is 8. So, multiply 1/2 by 4/4.

`=1+1/2*4/4+3/8=1+4/8+3/8`

Now that the fractions have the same denominator, let's proceed to add.

`=1+7/8`

Since this is in the form `a b/c=a+b/c` , then

`=1 7/8`

**Hence, `1 1/2 + 3/8=1 7/8` .**

Hi, user2337842,

There are various ways to do these. I prefer to do this.

Make the 1 1/2 an improper fraction

**1 1/2 = 3/2**

So, we have:

** 3 + 3 .**

** 2 8**

Then, determine the common denominator. We can use 8 here, because we can multiply the first fraction by 4/4:

** 3 * 4 + 3 .**

** 2 4 8**

That gives us:

** 12 + 3 .**

** 8 8**

Adding the tops, keeping the bottoms the same, we get **15/8**.

Many teachers want this in mixed number format. So, 15/8 means 15 divided by 8. That gives us 1 R7, or:

**1 7/8**

Good luck, useruser2337842. I hope this helps.