Question 1174282
<br>
Both responses you have received so far use the same algebraic approach, using a proportion.<br>
I personally find it easier and faster to solve the problem informally.<br>
The change from 12L of milk to 15L is an increase by a factor of 15/12 = 5/4, so you need to increase the amount of sugar by a factor of 5/4.<br>
ANSWER: (5/4)*5 = 25/4 = 6.25 cups of sugar for 15L of milk<br>