Guy finds how far his house is from several locations and make the table shown. how much farther away from guy's house is the library 9 tenths and the cafe 4 tenths

So, we've got two important and useful information: 
guy's house is 9/10 miles away from the library 
guy's house is 4/10 miles away from the cafe
now, the question will tell us which mathematical operation to use, it says:
how much farther than. that means comparing which means difference which means subtraction. (how much farther than=comparing=differnce=subtraction)
so now we know that we will subtract. but, subtact which number from which number? we need to subtract 4/10 from 9/10 which means it will be equal to 5/10 which can be simplified into 1/2
the answer is basically 5/10 and if you want to look smart for your teacher, you must write simplified=1/2..

hopw this helps... now.. for return i need the brainliest answer.. :) :D