Jasper kept track of the trick-or-treaters who came to his door and found that 1/4 were dressed as ghosts and 5/12 were dressed as witches. What fraction of the trick-or-treaters were dressed as either ghosts or witches?

For a school science project, john noted the temperature at the same time every day for one week. the high temperature for the week was 27°f, and the low temperature for the week was −3°f. what is the difference between the high and low temperatures john recorded?