Answer:
21.5%
Step-by-step explanation:
Percent = Part/Whole * 100:

3.35 - 3.10 = .25
.25/3.35 = .0746
.0746*100 = 7.46 or 7.5 rounded
Which variable are you talking about? In this question x is 4 and y is 5.
Hope this helped!
Good Luck!
Its 60 all you really had to do is 6 times 10