Question

How do you solve `\frac { 4.2} { 28} = \frac { 2} { x }`?

Answer 1

Cross multiplication

Explanation:

First we can cross multiply:
`4.2x=2*28`
`4.2x=56`

Now, we divide both sides by `4.2` to isolate the `x`:
`x=56/4.2`
`x=40/3~~13.333` rounded to 3 decimal places