When you ask "What number is halfway between 86 and 147?" 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=147.
To find the number halfway between 86 and 147, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 147 into our formula, we get:
(86 + 147)/2 = 116.5
Thus, the number halfway between 86 and 147 is 116.5.
To check that our answer is correct, we subtract 86 from 116.5 and subtract 116.5 from 147 and compare the two numbers:
116.5 - 86 = 30.5
147 - 116.5 = 30.5
As you can see, the halfway number is 30.5 higher than 86 and 30.5 lower than 147. Therefore, our halfway between answer of 116.5 above is correct.
Halfway Between
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Halfway Between 86 and 148
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