When you ask "What number is halfway between 66 and 249?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=66 and Y=249.
To find the number halfway between 66 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 66 and 249 into our formula, we get:
(66 + 249)/2 = 157.5
Thus, the number halfway between 66 and 249 is 157.5.
To check that our answer is correct, we subtract 66 from 157.5 and subtract 157.5 from 249 and compare the two numbers:
157.5 - 66 = 91.5
249 - 157.5 = 91.5
As you can see, the halfway number is 91.5 higher than 66 and 91.5 lower than 249. Therefore, our halfway between answer of 157.5 above is correct.
Halfway Between
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Halfway Between 66 and 250
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