Pre Algebra: Creating Ratios

1. Seven of a 15 member marching band are girls and the remainder are boys. What is the ratio of boys to girls in the marching band?

(A) 7:15
(B) 8:15
(C) 7:8
(D) 8:7
(E) 7:12

2. An hour long TV program has 18 minutes of commercials. What is the ratio of commercial time to the total air time?

(A) $\dfrac{3}{7}$
(B) $\dfrac{10}{3}$
(C) $\dfrac{7}{3}$
(D) $\dfrac{3}{10}$
(E) $\dfrac{8}{3}$

3. Richie is learning how to multiply fractions. On his last homework assignment, he got 8 questions correct and 9 questions incorrect. What is the ratio of questions he got incorrect to the total number of questions on the assignment?