Next time you eat at a restaurant, will you be able to work out how much to leave as a tip? This friendly penguin waiter can help you find the right answer.
There are four levels to this interactive challenge. At easy level, you will be told a percentage and asked to calculate the tip. Medium level does the same but with slightly trickier percentages. At hard, you will need to work out the percentage tip left, while if you are a super brain, you will be asked to calculate the original bill.
This is a good challenge for up to sixth graders, and sets percentages in the context of the world around us.