Question

Cho used 2 cups of flour to bake a cake. She used 3 cups of flour to bake a loaf of bread. How much more flour did Cho use to bakethe loaf of bread than to bake the cake?c ở cupc5 cupsC = cup1 cups

Answer 1

Choe used 7/12 cup (option A)

Explanation:

Number of cups of flours to bake a cake = 2 2/3

Number of cups of flours to make a loaf of bread = 3 1/4

To find how much more cups of flour was used in baking a loaf of bread than a cake, we will subtract the number of cups for the cake from the number of cups from the bread

$\begin{gathered} 3\frac{1}{4}\text{ - 2}\frac{2}{3} \\ \text{convert the mixed fraction to improper fraction:} \\ 3\frac{1}{4}\text{ = 13/4} \\ \text{2}\frac{2}{3}\text{ = 8/3} \\ \\ 3\frac{1}{4}\text{ - 2}\frac{2}{3}\text{ = }\frac{13}{4}\text{ - }\frac{8}{3} \end{gathered}$$\begin{gathered} \text{LCM of both fractions: 12} \\ \frac{3(13)-4(8)}{12}\text{ } \\ =\text{ }\frac{39\text{ - 32}}{12} \\ =\text{ }\frac{7}{12} \end{gathered}$

Hence, Choe used 7/12 cup more to bake the loaf of bread (option A)