IF statements assistance

[craigwojo]

I need a formula that if cell D2=P then in cell N2 I need the cell figures to be increased by .025.

Now cell N2 has a formula for it.
=IF(G2<4.5,0.25,IF(G2<100,0.225,IF(G2<200,0.2,0.15)))

Will this cause a error in the cell if there is a formula in it?

Thank you,
Craig

[craigwojo]

Can anyone answer this please.

Thank you,
Craig