If the ratio of boys to girls is 16:1 in Ryan's class, and there are 16 boys, how many girls are in the class?

There are 5 red marbles and 7 blue marbles in a bag. What is the ratio of red marbles to blue marbles?

Ben took a Math contest and got 10 correct and 35 incorrect answers. What was the percentage of correct answers? (Round to the nearest percent.)