其它
A recipe that makes~$5$~servings of hot chocolate requires~$2$~squares of chocolate,~$\dfrac{1}{4}$~cup sugar,~$1$~cup water and~$4$~cups milk. Jordan has~$5$~squares of chocolate,~$2$~cups of sugar, lots of water, and~$7$~cups of milk. If he maintains the same ratio of ingredients, what is the greatest number of servings of hot chocolate he can make? 
Overseas Competition->Knowledge Point->Calculation Modules->Ratios and Proportions
Assuming excesses of the other ingredients, the chocolate can make~$\dfrac{5}{2}\cdot5=12.5$~servings, the sugar can make~$\dfrac{2}{1/4}\cdot5=40$~servings, the water can make unlimited servings, and the milk can make~$\dfrac{7}{4}\cdot5=8.75$~servings. Limited by the amount of milk, Jordan can make at most~$\boxed{\left( D\right)\textbackslash{} 8\dfrac{3}{4}}$~servings. 