Landon is entering the science fair he has a budget of $115 he spent 20% of the money on new materials how much does london have left to spend

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?