When you ask "What number is halfway between 99 and 166?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=99 and Y=166.
To find the number halfway between 99 and 166, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 166 into our formula, we get:
(99 + 166)/2 = 132.5
Thus, the number halfway between 99 and 166 is 132.5.
To check that our answer is correct, we subtract 99 from 132.5 and subtract 132.5 from 166 and compare the two numbers:
132.5 - 99 = 33.5
166 - 132.5 = 33.5
As you can see, the halfway number is 33.5 higher than 99 and 33.5 lower than 166. Therefore, our halfway between answer of 132.5 above is correct.
Halfway Between
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Halfway Between 99 and 167
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