I need an answer not a link that don't work!

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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. after tax the total is 45.99. what percentage of the subtotal is the total?