It's the fan. Usually about 80% comes from the fan.
Turbojets are suited more to speeds in excess of Mach 1 and props become pointless at around 0.7. So going from there you could see that to optimize a passenger jet to fly at mach 0.75 - 0.8 will need more "prop" than jet. If that makes sense.
For any turbofan, have a look at the bypass ratio. That will give you a good idea of how much air gets blown through the fan compared to the jet. On the RR Trent 900 for example, the bypass ratio is 8.7:1