### Instruction: Given this paragraph about Love Island UK Season 9, Kai Fagan and Sanam Harrinanan won the final vote by what percent?
### Input: On 13 March 2023, the series was won by Kai Fagan and Sanam Harrinanan with 43.75% of the final vote, becoming the first couple formed during the Casa Amor twist to win the series. Lana Jenkins and Ron Hall finished as runners-up.
### Response: 43.75%