Find another name for the given number, but with the deniominator indicated. Use multiplication by 1.

2/7= ?/14

3 answers

7 ? = 28
? = 4

I don't see what "multiplication by 1" gets you.
What did you get as the answear? and how did u get it?
I got 4, by cross-multiplying.

When a/b = c/d, ad = bc