Answer: Both are correct. Desiree's ratio compares the total number of students in the room to the total number of tables, while Justin's is equivalent but simplified to students per table.
Explanation: The ratios 4:1 and 24:6 are both equal. 24/6=4 and 6/6=1. Also, their ratios are both correct not only because the ratios the same, but the comparison is also the same.