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How to Calculate Where a Number Fits in a Range

A range in math is the difference in the spread between two numbers. People use ranges all the time, perhaps without knowing it; anytime you see the word "between" with two numbers you have a range; often when you see the word "to" with two numbers it is a range as well. For example "Cook at 400 degrees for 15 to 20 minutes" has a range of 20-15 = 5 minutes.

Instructions

- 1
  Write the upper and lower numbers of the range. For example, if the range you are given is 15 to 20 minutes, write 15 and 20.
- 2
  Subtract the lower number from the higher number. In the example, 20-15 = 5.
- 3
  Subtract your number from the upper number. For example, if your number is 17, then 20-16 = 3.
- 4
  Divide the result in step 3 by the result in step 2. In the example, 3/5 = .6.
- 5
  Multiply by 100, this gives the percentile of your number in the range. In the example, .6 times 100 = 60; 17 is at the 60th percentile of the range 15 to 20.

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