In a school there are 4 boys and 28 girls. 10 more girls joined the school. How many more girls than boys does the school have?
There are 4 boys and 28 girls in the school. 

10 more girls joined the school. 

Now there are 38 girls in the school. 

There are still 4 boys in the school. 

There are 34 more girls than boys in the school.