Why the answer is not 11/3, in spite the question explicitly asking by what factor amount of solution x is larger than that of solution y? Even if we are supposed to subtract it should be 11/14 - 3/14 = 8/14, right? How come 8/3 is the answer, why are we doing 11/3-1?

I recommend revising the “Percent of versus Percent More” video on PrepSwift.