When you ask "What number is halfway between 15 and 228?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=15 and Y=228.
To find the number halfway between 15 and 228, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 228 into our formula, we get:
(15 + 228)/2 = 121.5
Thus, the number halfway between 15 and 228 is 121.5.
To check that our answer is correct, we subtract 15 from 121.5 and subtract 121.5 from 228 and compare the two numbers:
121.5 - 15 = 106.5
228 - 121.5 = 106.5
As you can see, the halfway number is 106.5 higher than 15 and 106.5 lower than 228. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 15 and 229
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