Question

The ratio of boys to girls in history class is 4 to 5. How many girls are in the class if there are 12 boys in class

Answer 1

the ratio is 4 to 5 what mean 4 boys to 5 girls 
so than there are 12 boys what is 3*4 than just multiplie 3*5 and will get 15 girls like result 

so than there are in the class 12 boys so will be in the class 15 girls sure 

hope helped