Deductions & credits

I am not sure Champ gave correct answer as turbo tax tells him to multiply his 18000 trade in value and enter the business portion so the answer would be a lower number entered?? whatever his Percentage of Business use claimed is Correct? not his 18k the dealer gave him?  go to the section and see?

I have same question I traded my Vehicle in 9/22 and they gave me 25K but it says multiply 48.36% which is 12,090.00 to enter the sales price Business Portion ??

Thanks