cgpa

I had a miserable CGPA in coll - 6.67 which according to my university norms equates to 6.67* 9.06=60.73%. I have applied for an exam which has 65% minimum requirement. I disregarded the conversion factor and multiplied my cgpa by 10 to get 66.7%. Will this be a worrying factor later. I mean...

As described in title. Whichever i take i will be taking CS as optional I suck at Algebra and chemistry(tough to remember the electronic valencies and stuff) I have got a CGPA of 8 in my 10th board results(GP in Maths was 7) I feel PCM->Engineering is tough while Com->MBA is easier