Help w/math plz!♥?

You are right. You can use proportions to solve this problem. Consider the information you are given. 3 homerooms have been surveyed. Mr. Archers room contains 35 students, Mrs Browns homerom contains 23 students, and Mr Chavezs homeroom contains 32 students (there are 5 people who take the bus for every 3 that walk. Since 20 take the bus, 12 must walk.). Therefore, the surveys covered 90 students out of 300. Of the 90 students, you know how many walk and how many of them take the bus. Use that as the basis for your proportion . You know that of the 90, 54 take the bus. That is a ratio of 54 over 90, or after simplifying, 3 over 5. Therefore, 3 out of every 5 students take the bus to school. Multiply 3 over 5 by 300 to get the total number of students out of 300 that you can expect to talk. Repeat this process to find out how many students walk. (Or, if you want an easier way, since 3 out of 5 students take the bus, that must mean that 2 out of 5 students walk, OR, once you calculate how many students take the bus, you can say 300 minus students who take the bus to get the number of students who walk)