non-inverting opamp gain question?

hello. i have a question about non-inverting opamp gain .In the image bellow ,the resistors make gain =1k/220=4.5.4
Now i need to turn the gain down ,but i only can change the value of 1k resistor.It's ok to lower the value of 1k resistor ,or even remove it ?

http://i247.photobucket.com/albums/gg132/chipmapple/opampgain.png

Thanks in advance!

Picture of non-inverting opamp gain question?