Yes.
19 over 1000 is the simplest form
19/1000 is in its simplest form.
19/200
19/500
19/40 is.
76/1000 = (4×19)/(4×250) = 19/250
0.152
4/19 is in its simplest form.
160/19 is in its simplest form.
19/37 is the simplest form
19/240 is in its simplest form.
4/19 is in its simplest form.