В классе 30 учеников,причем число девочек составляет 2/3 числа мальчиков.Сколько девочек и сколько мальчиков учится в этом классе?Какую часть всех учащихся класса составляют мальчики?

Помогите, пожалуйста!!!

Complete the second sentence so that a similar meaning to the first sentence using the word in bold and other words. You must use between two words, including the word given.

0) You can learn more about the country if you are staying there/

     LIVING

     You can learn more about the country be living in it.

1) Studying abroad seems difficult but interesting to many students.

    CHALLENGING

    Students understand how_________________is.

2) Studying abroad  is similar to studying at one's  home college.

    DIFFERENT

    Studying abroad is not __________________studying at home.

3) When you are abroad you can miss your relatives very much/

     DEPRESSED

    While abroad you ___________________because you can't see parents and  relatives.

4) You are in charge of all your things.

    RESPONSIBLE

   You_________________ everything.

5) You can learn a lot about yourself and the world while studying abroad.

   BEST

  Studying abroad__________________experience you can have

как делить четыре значные число на двух значных число обьясните