Please help I can seem to figure these out

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each

The least common multiple is the multiple, other than 0, common to sets of multiples.