Easy problem just look at the photo

Write each fraction as an equivalent fraction with a denominator of 120then write the original fractions in order from samllest to largest

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

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?