Curtis school has 1,575 students. the students to teacher ratio is 15 to 1. how many teachers are at curtis school.

You can set up a ratio and cross multiply and divide
put 15 divided by 1 as one ratio and set up a second where it has 1575 divided by X
then you can cross multiply and divide, so it's 1575 times 1 then divided by 15 and you should get x, which is 105. so 105 teachers for 1575 students

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