Like Marker indicated: It's near-as-dammit a 3 deg profile which equates to 300'/nm. Add 300' for each mile away from the the threshold (but comply with any specified minimum/required altitudes during the approach.
For the descent rate use Groundspeed x 5** = ROD.
eg GS on approach = 120kts so target ROD = 600'/min.
**some find it easier to do the maths mentally by using 'half the GS then tag on a 0'. eg 140 kt --> 70. Append a '0' --> 700'/min.