Question

Martha recorded the ratio of students and teachers at all the middle schools in the Timber Creek school district. The list is shown below.
20 students : 2 teachers
1 teacher per 15 students
1 teacher per 10 students
40 students : 4 teachers
5 teachers per 40 students
Part A: Identify the unit rates and ratios that are equivalent.
Part B: Give another unit rate or ratio that is not on the list but is equivalent to the ones from Part A. Explain why these are equivalent.

Answer 1

20:2 = 40:4 since 20/2 = 40/4 = 10:1
Now check the others. As for equivalent ratios, just multiply both parts by any number. For example, 5:40 = 5*3:40*3 = 15:120

Answer 2

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