Given:
Total number of cards in the binder = 625
Each page in the binder holds 9 cards.
To find:
The number of pages in the binder that can be COMPLETELY filled.
Solution:
We know that,

Putting the given values, we get


Approximate the value to the preceding whole number to get the number of pages in the binder that can be COMPLETELY filled.

Therefore, 69 pages of binder are completely filled.