Question

Помогите с задачей, пожалуйста. Число мальчиков в школе составляет 90% числа девочек.Сколько процентов составляет число девочек от числа мальчиков?

Answer 1

X- число мальчиков.
y- число девочек.
x/y=0,9/1
y/x=1/0,9
1,(1)*100=111,(1)

Answer 2

Calculating the Percentage of Girls in School

To calculate the percentage of girls in the school, we can use the given information that the number of boys in the school is 90% of the number of girls.

Let's denote the number of girls as G and the number of boys as B. We are given that B = 0.9G.

To find the percentage of girls in the school, we can use the formula: Percentage of girls = (Number of girls / Total number of students) * 100

Using the given relationship between the number of boys and girls, we can express the total number of students as B + G = 1.9G.

Now, we can calculate the percentage of girls in the school.

Calculation

The percentage of girls in the school is given by: Percentage of girls = (G / (B + G)) * 100

Substituting B = 0.9G into the equation: Percentage of girls = (G / (0.9G + G)) * 100

Simplifying the expression: Percentage of girls = (G / 1.9G) * 100 Percentage of girls = (1 / 1.9) * 100 Percentage of girls ≈ 52.63%

So, the percentage of girls in the school is approximately 52.63%.