Two different schools (A and B) have the same number of pupils

Two different schools (A and B) have the same number of pupils

Two different schools (A and B) have the same number of pupils. The ratio of the boys in school A and the boys in school B is 2:1 and the ratio of the girls in school A and the girls in school B is 4:5. Find the ratio of the boys in school A to the girls in school A.

Answer：ratio of the boys in school A to the girls in school A is 1:2