Can somebody plz help me plz answer both questions thx sm

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?