Write a fraction with a denominator of 4 that is equivalent to 6/8

The answer is 3/4 because 6/2=3 and 8/2=4

   6                      ?
    =      
   8                      4

How do you get from 8 to 4? You divide by 2.

   6                      ?
    =      
   8       ÷2           4

So lets do that to the top number, 6 as well

   6           ÷2        3
    =      
   8           ÷2        4

Answer=3/4

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet