Final answer:
To determine the number of albums needed, divide the total number of photographs by the capacity of each album.
Step-by-step explanation:
To determine how many albums the photographer will need, we divide the total number of photographs (2,700) by the capacity of each album (900). This gives us the number of albums required:
Number of albums = Total number of photographs / Capacity of each album
Number of albums = 2,700 / 900 = 3
Therefore, the photographer will need 3 albums to arrange all of his photographs.