The Answer Palette hangs to the side of the answer on your current line, and converts it into multiple forms as you type.
Currently supported answer forms are:
Decimal (123)
Degrees (123° 0' 0")
Hex (7B)
Binary (111 1011)
Fraction (1/5 for example)
Hover your mouse over an answer in the answer column so that a little "i" appears. Click on the "i" to show the palette. Click the i again to hide the palette.
Click the "Answer Palette" button in the toolbar.
Choose "Show Answer Palette" from the "View" menu.
Drag the number right into the text editor.
Control/right click and choose "Copy" from the menu.
Notes
Fraction will only be visible when the answer can be converted into a fraction.
Tips
If you're working with units, the answer palette will also show you the full name of the unit that the answer is displayed in (ie if your answer is 123m, the Answer Palette will tell you that the m is meters.
If you're working with currencies, the Answer Palette can show you your answer converted into different currencies choose which in the Numbers window.
Simply use a currency in your problem so that the answer is displayed in a currency also. You can type a currency using it's code (ie USD), or it's symbol (ie $).