Answer:
Fraction = 
Step-by-step explanation:
Every fraction has a numerator (dividend) and a denominator (divisor). To calculate them, we reason about the problem.
Denominator:
Initially, there are 18 children, but now Jorge arrives, so there are a total of 19 children.
Numerator:
Similarly, there were 7 children with stuffed animals, but Jorge brought a stuffed animal, so there are now 8 stuffed animals.
Fraction:
There are 8 children with stuffed animals (numerator) out of a total of 19 children (denominator).
The resulting fraction is 
Hope this helps!