What percentage of the customers surveyed prefer khakis

This week, conrad will work 1 3/4 times longer than last week. giovanni will work 1 1/3 times longer than last week. sally will work 2/3 the number of hours she worked last week. match each employee's name to the number of hours he or she will work this week

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Can you me find the missing length. i attached an image.