Question

гена прочитал 50 страниц книги в которой 250 страниц. Какой процент от объема всей книги осталось прочитать гене? Решить задачу двумя способами. ​

Answer 1

Пошаговое объяснение:

250:100 =2.5 50:2.5=20% 1 способ. 2способ пропорцией перекрестие пишешь 250 тере 100% 50 и напротив вопрос на что знаешь усножаешь то что не знаешь делишь

Answer 2

Ответ:

80%

Пошаговое объяснение:

1 способ.

1)250-50=200

250-100%

200-х%

2) 250х=200*100

250х=20000

х=20000:250

х=80%

2способ

50-х%

250-100%

50*100=250х

5000=250х

х=5000/250

х=20%

100%-20%=80%

Answer 3

Problem Analysis

To solve this problem, we need to find the percentage of the book that Gene has yet to read. Gene has already read 50 pages out of a total of 250 pages. We can solve this problem using two different methods.

Method 1: Using Proportions

We can set up a proportion to find the percentage of the book that Gene has yet to read. The proportion can be set up as follows:

50 pages / 250 pages = x% / 100%

To solve for x, we can cross-multiply and solve for x:

50 * 100 = 250 * x

5000 = 250x

Dividing both sides by 250, we get:

x = 20

Therefore, Gene has yet to read 20% of the book.

Method 2: Using Subtraction

Another way to solve this problem is by subtracting the number of pages Gene has already read from the total number of pages in the book, and then finding the percentage of the remaining pages.

Total pages - Pages read = Pages remaining

250 - 50 = 200

To find the percentage of the remaining pages, we can set up the following proportion:

Pages remaining / Total pages = x% / 100%

Substituting the values, we get:

200 / 250 = x / 100

Cross-multiplying and solving for x, we get:

250x = 200 * 100

250x = 20000

Dividing both sides by 250, we get:

x = 80

Therefore, Gene has yet to read 80% of the book.

Conclusion

Using both methods, we have determined that Gene has yet to read 20% and 80% of the book, respectively.