Multiple choice general knowledge math & puzzles x% of y is y% of ? x/y 2y x a complex value cant be determined Reveal answer Fill a bubble to check yourself C Correct answer Explanation x% of y is (x/100)*y. y% of x is (y/100)*x. Since multiplication is commutative, (x*y)/100 = (y*x)/100. Thus, the missing value is x.