Question

Jean had 3/4 cup of brown sugar. She used 3/8 cup to make a cake. How much sugar was left? A. 3/8 cup of sugar
B. 3/4 cup of sugar
C. 1/8 cup of sugar
D. 1/4 cup of sugar​

Answer 1

Given,

Jean had = ¾ cup of sugar

She used = ⅜ cup of sugar

To find,

The remaining amount of sugar.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Here, we just need to subtract the used amount of sugar from the total amount of sugar, in order to get the amount of remaining sugar. And, the general rule of fractional subtraction will be used here.

So,

The remaining amount of sugar :

= ¾ - ⅜

= (6-3)/8

= ⅜

(This will be considered as the final result, as this amount of sugar will be left.)

Hence, ⅜ cup of sugar will be left. (option A)

Answer 2

Given:

Jean had $\frac{3}{4}$ cup of brown sugar.

She used $\frac{3}{8}$ cup to make a cake.

To find :

The amount of sugar left with Jean.

Solution:

Jean had $\frac{3}{4}$ cup of brown sugar. She used $\frac{3}{8}$ cup to make a cake.

So, the amount of sugar left with Jean was,

$\frac{3}{4} - \frac{3}{8}$

By using cross multiplication method,

$\frac{3}{4} - \frac{3}{8} = \frac{3(8)-3(4)}{4(8)}$

$\frac{3}{4} - \frac{3}{8}$ = $\frac{24-12}{32}$

$\frac{3}{4} - \frac{3}{8}$ = $\frac{12}{32}$

$\frac{3}{4} - \frac{3}{8}$  = $\frac{3}{8}$

The amount of sugar left with jean was $\frac{3}{8}$ cup

Final answer:

Jean had $\frac{3}{8}$ cup of brown sugar left with him.