What are tenths fifths and fourths easy to convert to percents

1. what is the measure of ∠abc? what is the measure of ∠abd?

What is the value of x in the diagram below?

An episode of a television show is 60 minutes long when it originally airs with commercials. on a dvd without commercials, the episode is only 417 minutes long. how many1-minute commercials did the episode include when it originally aired? write and solve an equation to justify your answer.