Final answer:
The fraction of voters who did not vote for the winning candidate is 12/25, as 48% of voters chose another candidate or did not vote.
Step-by-step explanation:
If the winning candidate in an election receives 0.52 of the votes from 1000 voters, this means the candidate received 52% of the total votes. To determine the fraction of voters who did not vote for the winning candidate, we subtract the winning candidate's percentage from 100%. This gives us 100% - 52% = 48%. To express this as a fraction, we write 48% as 48/100, which can be simplified to 12/25. Therefore, the fraction of voters who did not vote for the winning candidate is 12/25.