280/320
70/320 is one.
fraction: 320/780 or 16/39
320 out of 400 as a fraction is 320/400. In simplest form it is 4/5.
320% = 320/100 = 16/5
20/320 = 1/16
320/1000 or 8/25
-104/320 = -13/40
1/320; one mile is 320 rods.
1/4
20
0.003125 = 3125/1000000 or 1/320 in fraction