When you ask "What number is halfway between 86 and 225?" 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=225.
To find the number halfway between 86 and 225, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 86 and 225 into our formula, we get:
(86 + 225)/2 = 155.5
Thus, the number halfway between 86 and 225 is 155.5.
To check that our answer is correct, we subtract 86 from 155.5 and subtract 155.5 from 225 and compare the two numbers:
155.5 - 86 = 69.5
225 - 155.5 = 69.5
As you can see, the halfway number is 69.5 higher than 86 and 69.5 lower than 225. Therefore, our halfway between answer of 155.5 above is correct.
Halfway Between
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Halfway Between 86 and 226
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