Question

Doing inverse operations word problem. Not sure where to put x when writing equation Baking a cake. Need 3/4 cup of flour. If you already have 5/8 cup of flour how much more do you need?

Answer 1

You will need 1/8 cup of flour

STEP - BY - STEP EXPLANATION

What to find?

Cup of flour needed to make it 3/4 cup of flour.

Given:

Cup of flour need =3/4

Cup of flour already available = 5/8

To find the cup of flour needed to make it 3/4 cup of flour, we will follow the steps below:

Step 1

Let X be the cup needed more to make 3/4 cup.

Subtract 5/8 from 3/4.

x = 3/4 - 5/8

Step 2

Find the equivalent fraction of 3/4 such that its denominator is 8.

That is;

$\frac{3}{4}=\frac{3\times2}{4\times2}=\frac{6}{8}$

Step 3

Replace 3/4 by 6/8 in step 1 equation.

$x=\frac{6}{8}-\frac{5}{8}$

Step 4

Simplify the above.

$x=\frac{1}{8}$

Therefore, you will need 1/8 more cup of flour.