When you ask "What number is halfway between 86 and 307?" 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=307.
To find the number halfway between 86 and 307, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 307 into our formula, we get:
(86 + 307)/2 = 196.5
Thus, the number halfway between 86 and 307 is 196.5.
To check that our answer is correct, we subtract 86 from 196.5 and subtract 196.5 from 307 and compare the two numbers:
196.5 - 86 = 110.5
307 - 196.5 = 110.5
As you can see, the halfway number is 110.5 higher than 86 and 110.5 lower than 307. Therefore, our halfway between answer of 196.5 above is correct.
Halfway Between
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Halfway Between 86 and 308
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