The epxression that can be used to determine the sales price of the kayak is 0.67k.
Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred. Percentages are used to measure frequency.
A discount reduces the price at which an item is sold. It makes the item cheaper.
Sales price = price of the item x (1 - discount)
k x (1 - 0.33)
k x 0.67
0.67k
To learn more about how to calculate discounts, please check: https://brainly.com/question/26061308