Aweek before an election, 1,500 people were asked who they planned to vote for. of the people asked, 45% said they planned to vote for candidate x, and 38% said they planned to vote for candidate y. the rest said they had not yet decided. how many of the people that were asked have not yet decided who they plan to vote for?

By difference, the percentage of people who are not sure who to vote is 100% - 45% - 38% = 17%. The number of people who have not yet decided to whom their votes goes is the product of 1,500 and 17% in its decimal equivalent.
                                (1,500) x (0.17) = 255
Therefore, 255 have not yet decided who to vote. 

I got it. My  ArtofFuz#0866