When you ask "What number is halfway between 27 and 150?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=27 and Y=150.
To find the number halfway between 27 and 150, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 27 and 150 into our formula, we get:
(27 + 150)/2 = 88.5
Thus, the number halfway between 27 and 150 is 88.5.
To check that our answer is correct, we subtract 27 from 88.5 and subtract 88.5 from 150 and compare the two numbers:
88.5 - 27 = 61.5
150 - 88.5 = 61.5
As you can see, the halfway number is 61.5 higher than 27 and 61.5 lower than 150. Therefore, our halfway between answer of 88.5 above is correct.
Halfway Between
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Halfway Between 27 and 151
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