Question

Оператор в первый день набрал 28%,а во второй день-20% страниц рукописи.После этого ему осталось 39 страниц.Сколько всего страниц в рукописи.

Answer 1

1) 100-28-20=52% - осталось набрать
2) 39:52•100=75 страниц в рукописи

Answer 2

Calculation of the Total Number of Pages in the Manuscript

To calculate the total number of pages in the manuscript, we need to determine the number of pages the operator had at the beginning and then calculate the percentage decrease over the two days.

Let's assume the operator had x pages in the manuscript at the beginning.

On the first day, the operator typed 28% of the pages, which means they typed 0.28x pages.

On the second day, the operator typed 20% less than the previous day, which means they typed 0.8 * 0.28x pages.

After the two days, the operator had 39 pages remaining.

We can set up the equation:

x - (0.28x + 0.8 * 0.28x) = 39

Simplifying the equation:

x - 0.28x - 0.224x = 39

0.496x = 39

x = 39 / 0.496

x ≈ 78.629

Therefore, the operator had approximately 78.629 pages in the manuscript at the beginning.

Please note that the result is an approximation due to rounding in the calculation.