An amusement park sold a total of 50 tickets. 47 of the tickets were child tickets, and the rest were adult tickets. What is the ratio of the number of child tickets to the total number of tickets?Write your answer as two numbers separated by a colon (for example, 2:3).

An airplane has 50 seats. 49 of the seats are empty. What is the ratio of the number of empty seats to the total number of seats?Write your answer as two numbers separated by a colon (for example, 2:3).

At a charity carnival, the ratio of the number of adults to the number of children is 2 : 5. Among the children, the ratio of the number of girls to the number of boys is 3 : 5. A total of 1392 game tickets are given out. Each adult receives 4 tickets and each child receives 10 tickets. How many tickets are given to the boys?

There were 100 boys in the park.The ratio of boys to girls was 2 : 3.After 20 boys left the park and some girls arrived at the park, the ratio of number of boysto the number of girls became 1 : 2.How many girls arrived at the park?

31 out of 84 students are going on a field trip. What is the ratio of the number of students who are staying at school to the total number of students?Write your answer as two numbers separated by a colon (for example, 2:3).

When a new group of 45 boys joined a concert, the ratio of the number of boys to the number of girls present became 2 : 3. The initial ratio was 5 : 9. How many more girls than boys were there in the end?