When you ask "What number is halfway between 15 and 330?" 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=330.
To find the number halfway between 15 and 330, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 330 into our formula, we get:
(15 + 330)/2 = 172.5
Thus, the number halfway between 15 and 330 is 172.5.
To check that our answer is correct, we subtract 15 from 172.5 and subtract 172.5 from 330 and compare the two numbers:
172.5 - 15 = 157.5
330 - 172.5 = 157.5
As you can see, the halfway number is 157.5 higher than 15 and 157.5 lower than 330. Therefore, our halfway between answer of 172.5 above is correct.
Halfway Between
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Halfway Between 15 and 331
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