В сентябре акции компании продавали по 600 р., а в октябре их стоимость понизилась, и акции стали продаваться по 510 р. На сколько процентов снизилась цена акций?

Russian television has over 100 channels which show all kinds of programmes: news and sports programmes, talk shows and quizzes, documentaries and feature films, soaps and police stories, comedy and concerts. The most popular entertainment channels are STS, TNT and RenTV. My favorite channel is STS. STS is mixture of cartoons and children's programmes, serials and feature films. One of the most my favorite program is serial called Voronins. I like it, because this funny serial about family and families relationship , there people are laughing at themselves. There are 9 people in this family , they are very different , but they United by one thing -No one and nothing can't separate them. It serial shows on TV every day from 15 to 18 hours.
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