How to convert linux/mac partition to fat/ntfs partition

You cannot delete the linux/mac partition from windows disk management window. You would have to wipe out disk and then create it via  windows “disk manager”.
Open windows command prompt and Type “diskpart” into the Command Prompt window and press Enter.
Type “list disk” at the DISKPART prompt and press Enter to view a list of disks connected to your computer. Identify the number of your Mac/Linux disk in the list. It should be the same as the number of the disk in the windows disk management window.
Type “select disk #” and press Enter to select the Mac/Linux disk, replacing # with the number of the Mac/Linux disk. For example, here we’d type “select disk 1”
Finally, type “clean” and press Enter. This command erases the entire selected disk, including all its files and partitions — whether they’re protected or not. You’ll have an empty, uninitialized disk after you do this.
You can now open the Disk Management window again. If you’ve left it open, you may have to click Action > Rescan Disks to update the data.
Locate the Mac disk in the list. It will be completely empty and display a message saying “Not Initialized.” Right-click it and select Initialize Disk.