Sarah has a photography blog. 3/7 of her photos are of nature. 1/4 of the rest are of her friends. what fraction of all sarah's photos is of her friends? support your answer with model.

So, of her photos are of nature, how many are not of nature? the rest, that is 1- = -=

So,   of her photos are not of nature.
this i what "the rest"in the question refers to

so, now
   of "the rest", that is of are of her friends. How many is that?

we have to multiply
*

we simplyfy and we get
  - this is the correct answer!