Question

You used 5 cups of flour to bake 80 cookies. How many cups of flour do you need if you bake 144 cookies?

Answer 1

Answer:

9 cups

Step-by-step explanation:

We can write a ratio to solve

5 cups                     x cups

------------            = ----------------

80 cookies            144 cookies

Using cross products

5 * 144 = 80x

720 = 80x

Divide by 80

720/80 = 80x/80

9=x

Answer 2

Answer:

7 1/5 cups of flour to mae 144 cookies

Step-by-step explanation:

80/5 = 20 cookies per cup of flour

so 20x7 = 140 and then you still need four more so take the four and another cup of flour and divide the 20 by 4 then you get 5 thus you 7 and 1/5ths cups