When you ask "What number is halfway between 86 and 449?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=86 and Y=449.
To find the number halfway between 86 and 449, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 449 into our formula, we get:
(86 + 449)/2 = 267.5
Thus, the number halfway between 86 and 449 is 267.5.
To check that our answer is correct, we subtract 86 from 267.5 and subtract 267.5 from 449 and compare the two numbers:
267.5 - 86 = 181.5
449 - 267.5 = 181.5
As you can see, the halfway number is 181.5 higher than 86 and 181.5 lower than 449. Therefore, our halfway between answer of 267.5 above is correct.
Halfway Between
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Halfway Between 86 and 450
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