
When you ask "What number is halfway between 53 and 86?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=53 and Y=86.

To find the number halfway between 53 and 86, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 53 and 86 into our formula, we get:
(53 + 86)/2 = 69.5
Thus, the number halfway between 53 and 86 is 69.5.
To check that our answer is correct, we subtract 53 from 69.5 and subtract 69.5 from 86 and compare the two numbers:
69.5 - 53 = 16.5
86 - 69.5 = 16.5
As you can see, the halfway number is 16.5 higher than 53 and 16.5 lower than 86. Therefore, our halfway between answer of 69.5 above is correct.
Halfway Between
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