Предмет: Математика, автор: ammmmmmm32

на сколько процентов уменьшился трафик мобильного интернета в мае по сравнению с апрелем 2019?
объясните, как решать, молю:'(​

Приложения:

Simba2017: в мае 150, апреле-375
Simba2017: 375-150=225
ammmmmmm32: это минуты, а мне гб нужны
Simba2017: ну тогда без меня...
iramazurk: Всё правильно тебе написали
iramazurk: Минуты красным, ГБ синим пунктиром
iramazurk: Май - 1,5 ГБ, апрель - 3,75 ГБ
ammmmmmm32: ну тк
ammmmmmm32: она минуты написала
Simba2017: ну если автор не понимает-чего вообще писать решение!

Ответы

Автор ответа: Удачник66
14

Ответ:

На 60%

Пошаговое объяснение:

Разговоры в минутах показаны красной линией, он тебе не нужен.

Интернет в Гб показан синим пунктиром, его и смотрим.

В апреле (4 месяц) был расход посередине между 350 и 400 Гб.

То есть (350+400)/2 = 750/2 = 375 Гб.

В мае (5 месяц) был расход 150 Гб.

Нам надо узнать, на сколько процентов 150 меньше, чем 375.

Составляем пропорцию.

375 - 100%

150 - X%

X = 150*100 : 375 = 40.

Итак, расход в мае составил 40% от расхода в апреле.

Это значит, что он уменьшился на 60%.

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Тест
1- вариант
1. I don't want to buy any of these books.I've got....
A) all
B) all them
C) everything
d) them all
e)something
2. The government is doing nothing to help....
A) poor
B) the poor
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3. I' ve got a meeting....Thursday afternoon
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4. I've always liked....
A) Chineese food
B) food of China
C) some food of China
d) the chinese food
e) a chinese food
5. How....time did you spend in the United States?
A) did
B) do
C) will
6.Someone....the tickets are free
A) said me
B) said me that
C) told me
d) told to me
e) asked me
7. What's the name of the man....gave us a lift?
A) he
B) what
c) which
d) who
e) whose
8. I'm looking for....to cut this string
A) a pair scissors
B) a scissor
c) a scissors
d) some scissors
e) scissor
9. Everyone in the group shook hands with....each other
A) each other
B) one other
c) one the other
d) themselves
e) other
10. All the guests were dancing....having a good time.
A) all were
B) every was
c) everyone was
d) someone were
e) each were
11. Formally the head of Canada is...
A) President
B) Prime Minister
C) Queen of Great Britain
d) Prince
e) Princess
12. When a child goes to school for the first time....
A) He is very sad
B) his life changes
C) he gets more money
d) he becomes very rich
e) He is nervous
13. You can see the details....the computer screen.
A) at
B) by
C) in
d) on
e) over
14. The....produced at our factory in Scotland.
A) good are
B) good is
C) goods are
15. I need to buy....
A) bread
B) a loaf bread
C) a loaf of bread
d) breads
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B) are said to
c) say
d) say to
e) are told

17.I really enjoyed the disco it was great,...?
A) is it
B) isn't it
C) was it
d) wasn't it
e) It was
18. I'm busy at the moment....on the computer.
A) I work
B) I'm work
c) I'm working
d) I working
e) I was working
19. At nine o'clock yesterday morning we....for the bus.
A) wait
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Помогите с тестом пожалуйста