type this formula into a cell:
=67/70
which will give you .9571 and if you format it as a % with 2 decimal places
it will appear as 95.71%
I presume you want to weight this score to 30% of a total. Let's say you
have 2 other scores of 80% in D1 and D2, with the 95.71% in D3, you could put
another formula somewhere as:
=D1*.35 + D2*.35 + D3*.3
That would account for 100% (.35+.35+.3 = 1)
Hope that helps.