Answer:
Explanation:
To find the ratio of children to adults in the tour group, you can simply divide the number of children by the number of adults:
Ratio = Number of Children / Number of Adults
In this case, you have 9 children out of a total group size of 21. To find the number of adults, subtract the number of children from the total:
Number of Adults = Total - Number of Children
Number of Adults = 21 - 9
Number of Adults = 12
Now, you can calculate the ratio:
Ratio = 9 children / 12 adults
To simplify this ratio, you can divide both the numerator and denominator by their greatest common divisor, which is 3:
Ratio = (9 ÷ 3) children / (12 ÷ 3) adults
Ratio = 3 children / 4 adults
So, the ratio of children to adults in the tour group is 3:4.