Fractions....ugh!

Shawnee77 · #1 $Old$ October 16th, 2009, 03:10 PM

Can someone please show me how to get the answer to this problem I have been working on it for day and im not figuring it out.

Below is a list of ingredients to make enough brownies for 16 people.

2/3 cup butter
5 oz. dark chocolate
1 1/2 cups sugar
2 tsp. vanilla
2 eggs
1 cup flour

Need to make enough brownies to serve 28

How much of each ingredient will I need?

Please, and thank you!!

Deadstar · #2 $Old$ October 16th, 2009, 03:15 PM

Multiply each ingredient by $\frac{28}{16} = 1.75$

To elaborate...

If those amount of ingredients make enough for 16 people then divide the ingredient amounts by 16 to get the amount needed for 1 person. Multiply this by 28 to get how much you need for 28 people.

streethot · #3 $Old$ October 16th, 2009, 03:29 PM

one set of ingredients serve 16 people
x a set of ingredients serve 28 people

16x=28

x=7/4

ie, we need 7/4 of each ingredient

Shawnee77 · #4 $Old$ October 16th, 2009, 03:48 PM

I got it thank you sooo much I multiplied 1 3/4 times each ingredient and came up with the answers and they were correct!

Moderator edit: The original post which Deadstar replied to was

Quote:

Originally Posted by Shawnee77

So is it that much added to the amount for the 16 people?

Deadstar · #5 $Old$ October 16th, 2009, 03:54 PM

No you MULTIPLY each ingredient for the 16 people by 1.75.

Shawnee77 · #6 $Old$ October 16th, 2009, 04:12 PM

thats what I meant sorry. Anyway they were all correct. thanks again I was struggling with that one for awhile.