When you ask "What number is halfway between 12 and 157?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=12 and Y=157.
To find the number halfway between 12 and 157, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 157 into our formula, we get:
(12 + 157)/2 = 84.5
Thus, the number halfway between 12 and 157 is 84.5.
To check that our answer is correct, we subtract 12 from 84.5 and subtract 84.5 from 157 and compare the two numbers:
84.5 - 12 = 72.5
157 - 84.5 = 72.5
As you can see, the halfway number is 72.5 higher than 12 and 72.5 lower than 157. Therefore, our halfway between answer of 84.5 above is correct.
Halfway Between
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Halfway Between 12 and 158
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