An auditorium has 100 seats for every 10 rows. Each row has the same number of seats. If s represents the number of seats and r represents the number of rows, which equation represents this proportional relationship?

So we need to find the number of people that can fit in each row. There are 100 seats for every 10 rows. Therefore, there are 10 seats per row. the equation would be:

s/10=r

S is the number of seats. Since 10 is 1/10 of 100, and 100 is s, we would so s/10