Debra found that 6 of the 24 students in her class own a cell phone . what is the ratio of students that own a cell phone to students that do not ? explain your reasoning to a classmate . ( plesee )

6:18 students in Debra's class own a cellphone. Because there are 24 people in total. Minus the people who already own cellphones. Leaving 18 without cellphones. The ratio is people who have cellphones to people who do not. 
24-6=18. Thus, the ratio would be 6:18