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Changes in range

Look at this set of 5 numbers:

 44 61 50 69 99

How would the range change if the number 12 replaced the number 69 in the set?

 increase decrease no change

The range is the difference between the greatest number and the least number.

Find the original range. Subtract the least number from the greatest number.

 99 – 44
=  55

The original range is 55.

Now replace 69 with 12.

 44 61 50 12 99

Find the new range. Subtract the least number from the greatest number.

 99 – 12
=  87

The new range would be 87.

The range would increase from 55 to 87.