Your middle school has 900 students one third of the students bring their lunch instead of buying your lunch at school what is the value of the ratio of the number of students who do bring their lunch to the number of students who do not?

1/3 of all students bring lunch
2:3 is the ratio of students who bring their lunch to the number of students who do not

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.