Question 434829
To determine productivity, we'll analyze how much the worker produced per hour.  We're given two ratios: {{{160/40}}} for the first week, and {{{138/36}}} for the second.  Since {{{160/40 = 4}}}, we can say that the worker produced 4 units per hour during week 1, since we are dividing units over time (and our measurement of time is hours).  Also, since {{{138/36 = 3.83333...}}}, we can state that the worker produced about 3.83 units an hour during the previous week.  Since {{{4 > 3.83}}}, the worker was more productive during the first week.