# Does significant figures make sense for percentages?

If I ask for a percentage with 2 significant figures, I mean something like $$62\%$$ or $$77\%$$, with no decimals.

But what about percentages below 10? Do I have to write them like $$5.6\%$$ ajust because with no decimals they would be one digit? What about $$100\%$$?

These percentages come not from measurements but from dividing integers (numbers of elements in a set that satisfy a property over the cardinal of the set). Does it make sense to use significant numbers in this context?

If your denominator is $$1000$$ then one decimal place in the percentage is the exact answer but reporting only the integer part will be easier to read. If your denominator is $$1,000,000$$ then four decimal places will be exact but zero or one or two may best convey what you are trying to say. If your denominator is $$10$$ just report the count.