Problem #6636 When Catman’s entourage joined the motorcade, the total number of vehicles increased 130 percent. If the final count was 345, how many vehicles were present in the beginning?.

Solution Denote by $x$ the number of vehicles that were present in the beginning. Thus, $(1.3+1)\cdot x=345$, so $x=345/2.3=150$.

Answer 150.