Question

andrew had 3 1/2 gallons of paint. he used 2/4 of it to paint the roof of their house. what fraction the paint did he use for their roof

Answer 1

Step-by-step explanation:

total gallons of paint he has =3½=

$\frac{7}{2}$

paint he used=2/4 of it

fraction of paint he used=

$\frac{2}{4} \times \frac{7}{2} = \frac{7}{4}$

he used 7/4,of paint

Answer 2

Answer:

2 gallons of paint

Step-by-step explanation:

 

If 3/4 of a gallon covers 2/5 of a wall, this means that a half of 3/4 gallons can cover 1/5 of a wall.

By knowing this, you can just make up your own expression

(the trick is to find a way to break it down to one, so you can multiply and manipulate it to save yourself some brain cells)

ans = 1.875

since we're talking about real life it would be 2 gallons of paint instead of 1.875 gallons to paint the whole wall