'Cause he got hit like I got hit, but he ain't fūcking breathing Now it's clear that I'm here, for a real reason

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%

Need showing work for this problem 56.25 ×25.80

1. if events a and b are non-overlapping events, how do you find the probability that one or the other occurs? 2. what does it mean if p(a or b) equals 1?