Respuesta :

There are 30 total people in the gym.

Use this proportion:

40 12

------- = --------

100 x


40% is the same thing as 40/100 which can be simplified to 2/5.

2 12

------ = ------

5 x

2 x 6=12

Since you multiply 2 by 6 to get 12 you have to do the same thing for 5. ----> 5x6=30

2 12

------ = ------

5 30

There you go! There are 30 total people in the gym. Thats your answer.

Hope this helps! :)