This Math quiz is called 'Numbers - Percentages - Increases and Decreases 1' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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You will often have to find a value when an amount increases or decreases by a percentage. There is more than one way of working it out.
Try this Math quiz about percentages and numbers to get you familiar with the methods.