Teaching the ratio word problems easily.
Q. Calculate the amount of flour required to make 24 cookies if one cup of flour makes 6 cookies. What is the ratio of flour to the number of cookies made?
Solution: As per the information, 1 cup of flour makes 12 cookies.
So, we can write the flour to cookies ratio as 1:12 or 1/12.
Similarly, assuming a “c” cup of flour is required to make 24 cookies, we can write the flour to cookies ratio as c:24 or c/24.
Now, to calculate the flour needed to make 24 cookies, we will set up a proportion between both flours and cookies ratios.
1:12 :: c:24 OR 1/12 = c/24
By cross multiplication, 1*24 = c*12
24 = 12c
C = 2
So, we will require 2 cups of flour to make 24 cookies.
Also, the ratio of flour to the number of cookies is 1:12.
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