When you ask "What number is halfway between 16 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=16 and Y=221.
To find the number halfway between 16 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 221 into our formula, we get:
(16 + 221)/2 = 118.5
Thus, the number halfway between 16 and 221 is 118.5.
To check that our answer is correct, we subtract 16 from 118.5 and subtract 118.5 from 221 and compare the two numbers:
118.5 - 16 = 102.5
221 - 118.5 = 102.5
As you can see, the halfway number is 102.5 higher than 16 and 102.5 lower than 221. Therefore, our halfway between answer of 118.5 above is correct.
Halfway Between
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Halfway Between 16 and 222
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