When kids are caught violating curfew, it simply means they are outside unsupervised at night. It does not necessarily mean they are planning to commit a crime or do something dangerous. Some parents or guardians work jobs with late hours and are not home to monitor their children late at night. Teens with only one parent living at home are more likely to be on their own. Therefore, opponents of teen curfews invoke the principle of fairness to say we should not punish teens whose only crime is not having an escort.

Option 1: 

Many people who oppose instituting teen curfews at night present data showing that youth criminal incidents are more likely to happen in the afternoon. Only 15 percent of juvenile crime occurs during normal curfew hours, between 10 p.m. and 6 a.m. What is 15 percent expressed as a fraction?

A.   15/100

B.   15/1000

C.   15/20

D.   5/100

Option 2: 

In some towns, fines for teen curfew violations generate revenue for local governments. But some say that revenue is not the point. Instead, they say the fines encourage people to obey the law. In 2025, the city council of Detroit, Michigan, voted to increase the fines for violating teen curfew law. Fines used to be $75 for the first incident and $250 for the second incident. As of 2025, the fine is now $250 for the first incident and $1,000 for the second. 

Write an equation to show how much more revenue Detroit will generate from teen curfew violations based on this increase. Let a represent the number of first-time curfew violations; let b represent the number of repeat curfew violations; and let r represent the increase in revenue.