Mr Jones feeds his big cat 1/3 of a can of cat food and he feeds his small cat half that amount. How much of a can does he feed his small cat? And then how much of a can does he feed both cats?

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