In a school, 10% of boys are equal to the one

In a school, 10% of boys are equal to the one - fourth of the girls. What is the ration of boys and girls in that school?

Let the number of boys = B
and number of girls = G
Then, 10% of B = 1/4 of G
⇒ B/10 = G/4
⇒ B/G = 10/4 = 5/2
⇒ B : G = 5 : 2