Question 701121
15ml of calamine to 60ml of solution 
60/6= 10ml
15/6=2.5ml
 This means that there are 2.5ml of calamine per 10ml of anti-itch lotion, thus for a 90ml of lotion you multiply 9 to both the solution and calamine=
 10*9=90ml
 2.5*9=22.5ml
Therefore, there are 22.5ml of calamine in a 90ml anti-itch lotion