Easy fractions 8/12 - 3/36 = ? simplify your answer

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Match the vocabulary to the proper definition. in probability, two events in which 1. conditional probability the outcome of one event is independent of the outcome of a second event. 2. dependent events in probability, two events in which the outcome of one event is dependent on the outcome of a second event. the probability of an event in which the outcome of the event is conditional on the outcome of one or more different events. 3. independent events

At your job you're paid $50 per week plus $3 per sale at least how many saled do you need to make in order to have over $250