There are 130 students in the ski club,50 of the students are boys. in the simplest form, write the ratio of the number of girls to the total number of students in ski club

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