But you must have Whatsapp already working on your Android phone.
Just make a backup All apps and data with Titanium backup from Whatsapp on your phone.
Go into the TitaniumBackup folder at your phone and copy the three files starting with com.whatsapp to your Asus tablet. U have to put these files in a folder named TitaniumBackup.
Then download Titanium Backup on your tablet.
In settings, applications, Development enable USB debugging and allow mock locactions. At applications enable Unknown sources.
Go to Titanium Backup and scroll to the com.whatsapp file.
Restore app and data.
Now you should have working Whatsapp !