Final answer:
The economy has approximately 80.6 million adults who do not participate in the labor force.
Step-by-step explanation:
The number of adults who do not participate in the labor force can be calculated by subtracting the number of unemployed and employed workers from the total adult population. In this case, the total adult population is the sum of employed, unemployed, and those not in the labor force.
Using the data provided, we can calculate:
Adults not in the labor force = Total adult population - (Number of employed + Number of unemployed)
Adults not in the labor force = 237.8 million - (143.7 million + 13.5 million) = 80.6 million
So, the economy has approximately 80.6 million adults who do not participate in the labor force.