Question

angela is making a cake that needs 1/4 cup of sugar for every 1/2 cup of flour. Angela adds 2 cups of sugar. How much flour in cups should angela use.

Answer 1

Angela should use 4 cups of flour. You can set this up as a ratio:
1/4 = 0.25
1/2 = 0.5
0.25 : 0.5 = 2 : x

To find the number that we need to multiply 0.5 by, we can divide 2 by 0.25 to get 8. Next, we can multiply 0.5 by that same number (8) to get 0.5 times 8 = 4.
0.25 : 0.5 = 2 : 4