Question

How would you write a unite rate? if the answer is 7. please help so confused!!

Answer 1

Here is an example:

To find the unit rate, divide the numerator and denominator of the given rate by the denominator of the given rate. So in this case, divide the numerator and denominator of 70/5 by 5, to get 14/1, or 14 students per class, which is the unit rate. 
hope it helped

Answer 2

You could do 7/49,4/28,12/84,&2/14 if you are doing constant of proportionality