Answer:
25%
Step-by-step explanation:
Total= 40 students
boys +girls= 40
30 +girls= 40
number of girls
= 40 -30
= 10
Percentage of girls
[tex] = \frac{10}{40} \times 100\% \\ = 25\%[/tex]
Alternatively,
percentage of girls
= 100% -(percentage of boys)
[tex] = 100\% - ( \frac{30}{40} \times 100\%) \\ = 100\% - 75\% \\ = 25\%[/tex]
