Answer:

Step-by-step explanation:
Set up the proportion




Answer:
27 years old
Step-by-step explanation:
So if they are 9 years old you can do 36 minus 9. You get 27. And it said the Ages combined, so if we combine/plus 27 and 9 then you get 36.
You can divide it and get 2.2
Answer:
0.2
Step-by-step explanation:
10v=2
v=2/10
v=0.2
Answer:
5%
Step-by-step explanation:
820 - 779 = 41. 41/820 = 0.05. 0.05 = 5%