Question

There are 40 students in a class. If 1/4

of them are girls, how many boys are there in class

​

Answer 1

it is the one/ fourth percent of X so 40×4 =160. 160 are total students then 40 are girals so 160-40=boys=120

Answer 2

Question:

There are 40 students in a class. If 1/4 of them are girls, how many boys are there in class.

Answer:

Fraction of girls in class = $\frac{1}{4}$

Fraction of boys in class = $\frac{4}{4} -\frac{1}{4}$

= $\frac{3}{4}$

Total number of students in class = 40

Total number of boys = $\frac{3}{4}$ × $40$

= $3$ × $10$

= $30$

Hence,

There are 30 boys in class.

Hope it helps