Question

12: 5 = 20: х ; Найдите: 5) 6% от числа 800;

Answer 1

12 : 5 = 20 : Х - пропорция.

Свойство пропорции - произведение крайних членов равно произведению средних членов.

12*Х = 5*20 = 100

Х = 100 : 12 = 8 1/3 - ОТВЕТ

5)  Ответ находим умножением.

6%*800 = 0,06 * 800 = 48 - ОТВЕТ

Answer 2

To find the value of "x" in the proportion 12:5 = 20:x, we can use cross-multiplication.

Cross-multiplication means multiplying the diagonally opposite terms of the proportion and setting them equal to each other:

12 * x = 5 * 20

Now, let's solve for "x":

12x = 100

Divide both sides by 12:

x = 100 / 12

x ≈ 8.3333 (rounded to four decimal places)

So, the value of "x" in the proportion 12:5 = 20:x is approximately 8.3333.

Next, let's find 6% of 800.

To calculate 6% of 800, you can multiply 800 by 0.06 (since 6% is equivalent to 6/100 or 0.06):

6% of 800 = 0.06 * 800

6% of 800 = 48

Therefore, 6% of 800 is 48.