HELP WITH PERCENTAGES - DISCOUNTS AND MARKUPS! DUE TOMORROW!! (18 POINTS)

You buy a pair of jeans at a department store.
Jeans = $39.99
Discount = - $10.00
Subtotal = $29.99
Tax = $1.95
Total = $31.94

a. What is the percent of discount to the nearest percent?
The percent of discount is
?%.

b. What is the percent of sales tax to the nearest tenth of a percent?

The percent of sales tax is
?%.

c. The price of the jeans includes a 60% markup. After the discount, what is the percent of markup to the nearest percent?

The percent of markup is
?%.