How much of something per 1 unit of something else.
Examples:
• 100 cars pass by in 2 hours. The unit rate is 50 cars per hour.
• You can paint 3 boards in half an hour. The unit rate is 6 boards per hour.
• 200 sausages were eaten by 50 people. The unit rate is 4 sausages per person.
• They need 5 m of thread to make 2 cm of cloth. The unit rate is 2.5 m per cm.
