You can’t really know the y value unless you’re told that they’re both directly proportional. if so, then check out the pic
21,437 multiply 221 by 97
Greater than bc the pieces is bigger
If you are asking which operation to use then your best bet would be to multiply the fractions by whole numbers to get the same denominator. I chose the denominator to be 30.
1/6*5=5/30
1/15*2=2/30
Now compare.
Remember to simplify