I don't know which one I should make the reciprocal.

Question

Convert the map scale to a unit rate. How many inches represent one mile?
3/10 in.=7/8 mi.
I just need help choosing which one I should make the reciprocal, I can do the rest.

Answer 1

you want to convert mi to in.
since 3/10 in = 7/8 mi
(3/10 in)/(7/8 mi) = (7/8 mi)/(3/10 in) = 1

you can always multiply by 1 without changing things, so pick the representation of 1 which cancels the unit you don't want:

1 mi * (3/10 in)/(7/8 mi) = (3/10)/(7/8) = 24/70 = 12/35 in

Answer 2

Can someone tell me which one I need to flip and not give me the rest of the steps to do it? Please? I can do the problem on my own but I only need one sliver of help, and that's which fraction I need to turn upside down to finish the problem. both responses I've gotten are not the way I just learned in my lesson. Can someone please give me the information I'm asking for?

Answer 3

Clearly you did not read Steve's response.
He showed you which fraction to use, and the way to tell in general.

Answer 4

Actually I did read Steve's response, he gave me the process that I did not learn and I asked for the reciprocal. The process that I need to do is to;
Multiply the other fraction by the reciprocal
Either turn that fraction into a mixed number or simplify it.
I just need the reciprocal.

Answer 5

I'm supposed to flip 7/8. That was all I wanted.