Roger earns $78,000 annually as an architect and is paid monthly. adrianne also earns $78,000 but she is paid biweekly. how many more checks does adrianne receive in a year when compared to roger?

Begin with Roger Since he is paid once a month. You know he will receive only 12 checks per year. 
Next multiply 12 * 2 = 24 for Adrianne. 
Then take 
24 (adrianne) - 12 (Roger) =
Which gives you 12 checks. 
The amount they each make is irrelevant, since the question is only asking about the checks, not amount per check. 

Your answer is 
Arianne receives 12 more checks then Roger per year. 

Ibelieve the second one, but if not, the first one will do. hope this : )