First a AMD A6 is nothing 'really good', but will do what your asking it to do (personally I seen cheaper here in the States, where as low as $249 for something similar). Now also DO remember just because you have Google Chrome open that doesn't mean you have "1 application open". If you open Task Manager you will see multiple Chromes listed, due to the different Chrome apps or number of 'tabs' you have open this can REALLY be "10-20" application open. Just so you have some 'context' as to why your Fan Speed is at 72%.
That said, if the noise is too loud, then you should bring it back as a fan may be out of alignment. Unless of course your version of "Warranty" and "new" is you bought this 8 months ago, which then is a DIFFERENT story. If this is more then 30 days old then you MAY need to just buy CANNED AIR and BLOW OUT THE VENTS as the noise can be simply dust, skin flakes, hair, pets, smoke, etc. all bound up on the fans and 'clogging' things up.