BRUH Christopher stop trying to get to understand how to balance chemical equations. I'm trying to be a baker when I grow up so I don't need this in life.

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