When you ask "What number is halfway between 86 and 169?" 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=169.
To find the number halfway between 86 and 169, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 169 into our formula, we get:
(86 + 169)/2 = 127.5
Thus, the number halfway between 86 and 169 is 127.5.
To check that our answer is correct, we subtract 86 from 127.5 and subtract 127.5 from 169 and compare the two numbers:
127.5 - 86 = 41.5
169 - 127.5 = 41.5
As you can see, the halfway number is 41.5 higher than 86 and 41.5 lower than 169. Therefore, our halfway between answer of 127.5 above is correct.
Halfway Between
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Halfway Between 86 and 170
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