How to print exact 50% scaling in Adobe Acrobat X

Simple Question:

How to print exact 50% scaling (e.g A1 PDF > A3 paper) in Adobe Acrobat X (version 10.1.16)

OR

Is this simply a crucial function removed from the software? If so why?

extra info:

(Have updated version of Acrobat)

Windows machine at work

Windows 7 Professional (Service Pack 1)

Printing to Ricoh MP C3004ex (multi-function printer) (with updated driver)

There is no "Scaling" option as can be seen below:

Thank you for any answers in advance.