Sometimes we need to print a pdf on a page that is lesser then A4 size. The main reason for this kind of printing is that size reduction. Carrying a A4 PAGE book is not that handy most of the times.
For this we need to reduce the size of the page while printing. Unfortunately in Acrobat PDF Reader this option is not present.
For this we can use the the PDF-XChange Viewer free edition.
Download the PDF-XChange Viewer from http://www.tracker-software.com/product/downloads/
Select File->Print option and Select the Page Scaling as => Custom Scale and Page Zoon as 75% and Select Auto-Center pages in sheets
Please refer to the screen below
After this you can cut the extra white space using a paper cutter.