Question

if kevin took 1/10 of an hour to use 1/2 of package of napkins. how many hours would it take to use 2 packages?

Answer 1

2/5 hours

Explanation:

We can write a proportion to solve

1/10 hour x hours

---------------- = -------------------

1/2 package 2 packages

Using cross products

1/10 * 2 = 1/2 x

1/5 = 1/2x

Multiply each side by 2

1/5 * 2 = 1/2x *2

2/5 =x

2/5 hours