Answer
Trey Parker $350$, Larry David $ 800$, and Matt Groenning $ 500$ million.
Work Step by Step
Step 1. Assume Trey Parker is worth $x$ million; we have Larry David worth $x+450$ and Matt Groenning worth $x+150$ million.
Step 2. The total worth is $x+x+450+x+150=1650$; we have $3x=1050$ and $x=350$ million.
Step 3. We conclude that the worth in millions are: Trey Parker $350$, Larry David $350+450=800$, and Matt Groenning $350+150=500$ million.
