Melania walked her dogs 2 1/5 miles cathay walked her dog 1 3/4 times as far as melania how many more miles did cathay walk her dog

First off, let's keep in mind that a "whole" is a 1 unit, namely, same/same, in this case, we can say that four fourths is one whole, namely 4/4 is 1 whole.

so, we know Melania walked her dog 2 and 1/5 miles, that'd be a whole, or 4/4.

we also know that Cathay walks hers 1 and 3/4 of that, hmmmm let's convert both fractions to "improper" and take it from there.