Question

An electrician needs 3 rolls of electrical wire to wire each room in a house. How many rooms can he wire with 3/4 of a roll of wire?

Answer 1

Answer:

He can wire

$\frac{1}{4}$

of a room with 3/4 of a roll of wire.

Step-by-step explanation:

We can solve by using proportions.

Let's set it up.

$\frac{3 \: rolls}{1 \: room} = \frac{ \frac{3}{4} \: of \: a \: roll}{x}$

We are now going to cross multiply. By cross-multiplting, you would get:

$\frac{3}{4} = 3x$

You are now going to divide both numbers by 3 in order to get the x by itself.

$\frac{ \frac{3}{4} }{3} = \frac{3x}{3}$

By dividing, you get:

$\frac{1}{4} = x$

Therefore, the answer is 1/4.

Answer 2

Answer:

1/4

Step-by-step explanation: