Question

at a restaurant you only have $20 to spend on dinner. in addition to the cost of the meal you must pay a 5% sales tax and leave a 15% tip. what is the most expensive item you can order

Answer 1

take the total amount which is $20 and multiply by the reciprocal of 120% (5/6)
$20*5/6=$16.66= most expensive item that you can order