Jada has a meal in a restaurant. She adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. When the check comes, it says they also need to pay $3.99 in sales tax. What percentage of the subtotal is the sales tax? After tax, the total is $45.99. What percentage of the subtotal is the total? They actually pay $52.99. The additional $7 is a tip for the server. What percentage of the subtotal is the tip?