The cafeteria at Local Middle School offers a choice of either a sandwich or soup every Thursday.
Of 55 students who purchased lunch this Thursday, 30 chose a sandwich.
What is the ratio of the number of students who chose a sandwich to all those who purchased lunch this Thursday?

The cafeteria at Local Middle School offers a choice of either a sandwich or soup every Thursday Of 55 students who purchased lunch this Thursday 30 chose a san class=