HELPPP ME ASAP.it for math

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?