i need help with this open-ended

you are having so much fun in the kitchen you decide that you want to make your aunt,s favorite dessert to show her special she is to you .you find the recipe on the internet for the recipe white raspberry cheesecake .bellow are the ingrenditants necessary for 16 servings :
White Chocolate Raspberry Cheesecake

*1 1/2 cups of Chocolate cookie crumbs
*3 tablespoons of white sugar
* 1/4 cups of butter,melted
*5 (2 ounce ) package of frozen raspberries
*2 tablespoons of white sugar
*3/4 cup of water
*2 tablespoons of cornstarch
*2 1/2 cups of white chocolate chip
*1/2 cup of half and half cream
*6 (4 ounces) package of cream cheese ,sofened
*1/2 cup of white sugar
*4 eggs
*7/8 teaspoon of vinilla extract

question:
how many of ingrenditants will you need if you want to make a cheesecake that severs 1/4 of 16 explain

Basically you need to make a cheesecake for four people. All you need to do is multiply everything by .25 (1/4) so :

3/8
3/4
1/16
5/4 bags
1/2
5/8
1/8
3/2 bags
1/8
1 egg
7/32