Question

Noah spent 25 hours working on his car. He spent `4/5` of his time working on the transmission. How much time did Noah spend working on the transmission?

Answer 1

See below.

Explanation:

To solve this problem, you have to set up a proportion.

`x/25` `=` `4/5`

In this problem `x` is how any hours Noah spent on transmission.
To find `x` you have to cross multiply.

`x` `*` `5` `=` `5x`

`25` `*` `4` `=` `100`

Now, you have to divide the product of the constants constants that don't have a variable (`24` and `4`) by `5` to find `x`.

`100` `÷` `5` `=` `20`

Our final answer for `x` is `20`.

Noah spent a total of `20` hours, or `4/5` of his `25` hours, working on transmission.

I hope this helps (: