There are too many ways to work out a simple sum, but I will list a few:
400 divided by 2 is 200, 10 divided by 2 is 5, so the answer is 205.
By factorizing 410, you will get 41 * 2 * 5. Take away 2 and you get 41 * 5 = 205.
2
44
180
400
181.5
25.
0.07142857
31.5
1.65
25,074/2 = 12,537
1/2
0.04444