In the auditorium there are 7 red chairs and 43 blue chairs what's the ratio of number of red chairs to the total number of chairs

7:50 or 7/50

Explanation:

# of red chairs + # of blue chairs = # total
So, 7+47=50 total.
Then take the # of red chairs and put it first in the ratio to the total number of chairs, 50.

The answer is mathg.a.y