Question

the total number of students in a school is 400 . what is the percentage of boys if the girls is 150​

Answer 1

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Given :-

• Total number of students in a school 400

• Number of girls is 150

To Find :-

• Percentage of boys.

★ Concept :-

First we have to find the number of boys in the school then divide the number of boys by the total number of students and multiply it by 100 to get the percentage of boys.

★ Finding the number of boys

» Total number of students - number of girls

» 400 - 150

» 250

The number of boys in the school is 250.

★ Finding the percentage of boys :-

~ We know that :

$\large \begin{gathered}{ \boxed{ \underline{ \sf{ \pink{ \frac{Number of boys }{ Total number of students } \times 100 }}}}} \end {gathered}$

$\hookrightarrow \sf{ \dfrac{250}{4 \: \cancel{00}} \times 1 \: \cancel{00 }}$

$\hookrightarrow \sf{ \dfrac{ \cancel{25}}{ \cancel{4}} }$

$\hookrightarrow \sf{6.25}\%$

$\large \begin{gathered} { \boxed{ \underline{ \sf{ \green{Therefore, the \: percentage \: of \: boys \: is \: 6.25\%}}}}} \end{gathered}$

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Answer 2

Answer:

The total number of students = 400

Let the no. of boys be x .

The girls = 150 .

We are given the total no. of girls = x + 150 .

= x + 150 = 400

x = 400 - 150

x = 250 this is answer of no. of the boys .

Now , the percentage .

Number of boys

_____________ × 100

Total number of students

= 250 / 400 × 100

= 25/4

= 6.25%

So , the percentage of boys is 6.25%