There are 461 students and 20 teachers taking buses on a trip to a museum. Each bus can seat a maximum of 52. What is the least number of buses needed for the trip?
Each bus can take at most 52 people.
The number of buses needed =
You might be tempted to round down to 9 buses (because of the 2 that follows the decimal)
However, if there are 9 buses,
There will still be
This is an example of where you need to round UP to the next whole number.
In reality it means that not all the buses will be full, but 10 buses are needed to ensure that everyone gets a ride to the museum.