Rosy waxes 2/3 of her car with 1/4 bottle of car wax. At this rate, what fraction of the bottle of car wax will rosy use to wax the entire car?

8/3 = 1/x or x = 3/8

Step-by-step explanation:

Set up the ratio

(2/3) / (1/4) = 1/x

solve for x

8/3 = 1/x or x = 3/8

Wax required for entire car = 3/8 bottle of wax

Step-by-step explanation:

We have given,

1/4 bottle of car wax can wax 2/3 of her car.

We need to find the wax required to wax her car completely.

Let's derive the relation between wax bottle and car waxing rate:

2/3 of car waxing needs 1/4 of bottle of wax.

for entire car waxing, i. e 1 car waxing needs (1/4) / (2/3) bottle of wax

wax required for entire car = (1/4) * (3/2)

=3/8 bottle of wax