9/280 = 0.032142857 recurring (that is, 0.032142857142857...)
0.0321
280
No, 280 divided by 9 equals 31 mod 1 (31.1 repeating). The factors of 280 are 2,2,2,5, and 7.
65 divided from 280 = 0.23214285714285715
280 divided into 35 = 8
56
70
280
280
35
0.0071
280 divided by 4 is 70.