Can i have both ? : ) also if someone could tell me how to tell if it’s irregular or regular because i am having some trouble with this : )

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

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

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?