In Round 1, New York received 12 votes. These voters could only choose Beijing or Paris in Round 2.
Given that 75% of Beijing's Round 1 voters stayed with Beijing in Round 2, and the remaining went to Paris, we use the total vote tally in Round 2 (83 votes) to back-calculate.
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From Round 2: Beijing got 21 votes total.
Let $x$ be the number of New York voters in Round 1 who chose Beijing in Round 2.
We know Beijing's Round 2 votes came from:
- 75% of its own Round 1 voters: $0.75 \times B_{R1}$
- Plus $x$ from New York voters.
Solving with given totals, $x = 8$.
Percentage = $\frac{8}{12} \times 100 = 66.67%$.