Explanation:
again, if you don't know anything else, get 100% and/or 1%. everything else can be calculated out of any of these. including themselves, as e.g.
100% = 1% × 100
so, we know
34% = 68
now, what is 1% ?
1% = 34%/34 = 68/34 = 2
and now,
100% = 1% × 100 = 2 × 100 = 200
the original number is 200.