Yes you can...
Here's a link to the manual.. 1st make sure you back up files in both Ubuntu and Windows = Ubuntu will be formatted and Windows as a just in case..You can ready the Ubuntu partitions prior using gparted from the liveUSB or while installing using something else..
When installing make sure LL is installing to the corresponding drives you had for Ubuntu
sdx"/" will be formatted during the process.
Some other info:If you're bios is set to UEFI, you will need to install via legacy option, this is mentioned throughout the forums and the above manual..
For the LL partitions, size accordingly to your needs/wants.. Some prefer a separate partition for "/home" - if you have this partitioned in Ubuntu you can use as is...
It's pretty straight forward.. good luck
Update: you added the pic
So yes.. sda9(/) sda10(/home) and sda8(swap) point the install to sda9...
Looks like it is UEFI - give this information a look over...
I haven't installed using legacy but others have and anything posted by gold-finger is rock solid info
