# Math

posted by .

Find the missing number.

5/15 = ?/3

• Math -

5 / 15 = x / 3

5 * 3 = x * 15

15 = 15 x Divide both sides with 15

x = 1

5 / 15 = 1 / 3

• Math -

I got the answer 1 by doing this...

15 divided by 3 = 5
5 divided by 5 = 1

Is that a wrong way to answer the problem?
That's the way my book shows.

• Math -

That's the way I got the answer too. Thank you!!!

## Similar Questions

1. ### Math-Proportions

My math question says- 1 1/2:9 = x:18 Now I gotta figure out the missing number [x]...I have 3 guesses on what answer the missing number [x] is! Either- A)2 1/2 B)3/4 or C)3 Which one is it?
2. ### MATH

I'M HAVING A PROBLEM WITH THIS PROBLEM,IT SAY'S FIND THE MISSING NUMBER HERE IS AN EXAMPLE PROBLEM, _ + 7 + -7 = -8 ,I NEED HELP WITH THAT . First: + 7 + -7 = 0 ___ + 0 = -8 Do you see what the answer is now?
3. ### math

I don't get these concepts for fractions example find each missing number 6 2/5 = 5 _?

5. ### MATH-Stuck

For each of the following, the Surface Area is given. Calculate the missing dimension. This is a rectangular prism with the width missing. The height seems to be 20 cm. The length I guess is 34 cm, and the Surface Area is 6020cm square. …
6. ### CHEMISTRY

I am having trouble understanding how to come up with the products for single replacement reactions. Can any one check my work and tell me what i am doing, and also point out if i am missing any rules. 1. KI + Cl2 ---> 2. Fe + HCl …
7. ### college math

Find the measure of the missing angle a = 33o would the correct answer be 66
8. ### Math

If the average of these four numbers is 21, find the missing number. 12, 18, 28, ?