Whats the difference of -2 2/3 and 5 1/3

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?