partition problem plz help me ..

[shiva anand]

Good morning sir,

I have a Ubuntu Linux on my laptop and i have almost 2 GB partition for swap file system. 
i need to reduce the size. but i can't. 
Could you please give me steps to how to reduce the swap partition size on my laptop.. 
present my swap partition on /dev/sda7. starting point 9500 and ending 9729. 

please help me.. 

thank you very much,
Shiva.