For every 9 children, there are 4 adults. If there are 39 children and adults, we can work backwards to find the answer.
Lets start by multiplying 9. Lets do 3. 9 x 3 = 27. Ok, now we have an estimate of 27 Children, now all we have to do is multiply the number of adults by 3. Now we can multiply 4 x 3. 4 x 3 = 12. Now we have the number of children and adults. Now lets add these together. 12 + 27 = 39! Perfect! Now we know that there are 27 children, and 12 adults.
