You seem to be unaware of the fact that you could have obtained the answer much more easily and quickly by using the calculator that comes as part of your computer.
900/25 = 36.
Think about that logically. I'm sure you know 25 goes 4 times into each hundred. This question is about 9 hundred, so it comes down to 4 x 9 which = 36 times.
Exactly 36 times
36
4.44
30 times
25 goes into 25 one time.
25 ÷ 6 = 4 with remainder 1
4.3478 times.
2 with remainder 7
10 with 2 remaining
Thrice with a remainder of five
12 goes into 900 75 times
125/25 = 5
9, remainder 15