Teasia bought her grandfather a tie his birthday. The tie cost $12.99 and was hanging on the 50% clearance rack. How much was the cost of the tie after the discount?

The discount was 50% off, which means the tie was priced at half of $12.99.

$12.99 / 2 = $6.495

So, the cost of the tie after the discount was $6.50.