In Ms. Jacob's dance class there are 3 girls for every 7 boys. If there are 35 boys in the class, how many girls are there?

Question

In Ms. Jacob's dance class there are 33 girls for every 77 boys. If there are 3535 boys in the class, how many girls are there?

Answer 1

3/(3+7)= 3/10 = 30% girls of total

30% of 35 = (3/10)(35 = 3/2 x 7 = 21/2 = 10.5 girls, probably 11 girls, round up

or if g= 33, b=77, total= 3535, then

33/(33+77) = 33/110 = ratio of girls to total students

33/110 x 3535 = 33/22x 707 =3/2x 707=2121/2 =1060.5= about 1061 girls