Question

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 ?

Answer 1

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

Explanation:

Set up the ratio

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

solve for x

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

Answer 2

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

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