Percentage of voters who voted = 60%60\%60%Percentage of those who did not vote = 100%−60%=40%100\% - 60\% = 40\%100%−60%=40%Number of people who did not vote = 40% of 1500040\% \;of\; 1500040%of15000
= 40100×15000\frac{40}{100}\times 1500010040×15000
= 600060006000
Therefore, 600060006000 people did not vote.