Joan walked 23 1/4 miles in a week. her sister walked 69 3/4 miles during the same week. how many times farther did joan’s sister walk than joan?

joans sister walked 3 times farther.

Joans sister walked 3 times farther.

23 1/4 * 3 = 69 3/4

Do you need two expressions or one expression? 
If it was one expression for both Denise and Stacy, it would look like this: 

12 + 14c + 5g (12 = total amount in dollars of admission fee, 14c = total number of rides ridden, and 5g = total number of games played) 

A single expression for Stacey would be: 

6 + 7c + 3g

A single expression for Denise would be: 

6 + 7c + 2g

Hope this helps!