hi iam undergoing a project with irf540 in that, how should i give input pulse to fet expecting a duty cycle of 0.75

 

hi iam undergoing a project with irf540 in that, how should i give input pulse to fet expecting a duty cycle of 0.75

is that .75% or 75%?
What is it driving?

 

The MOSFET does not determine duty cycle, it is the circuit driving the MOSFET that does that.