Question

The following grid model shows the number of girls and boys in a grade. Out of all students, the percentage of girls is

• A. 20%
• B. 30%
• C. 25%
• D. 15%

Answer 1

The correct option is C 25%

Total number of students
in the grade = 40

Number of girls = 10

∴ Fraction of girls in the school = $\frac{10}{40}$

Simplifying $\frac{10}{40}$, we get:

$\frac{10}{40}=\frac{10÷10}{40÷10}=\frac{1}{4}$

Now to get percentage, we have to make the denominator 100.

Converting $\frac{1}{4}$ into a fraction with denominator 100, we get:

$\frac{1}{4}=\frac{1\times 25}{4\times 25}=\frac{25}{100}$

Hence, the percentage of girls in the grade is 25% .