When you ask "What number is halfway between 15 and 662?" 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=662.
To find the number halfway between 15 and 662, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 662 into our formula, we get:
(15 + 662)/2 = 338.5
Thus, the number halfway between 15 and 662 is 338.5.
To check that our answer is correct, we subtract 15 from 338.5 and subtract 338.5 from 662 and compare the two numbers:
338.5 - 15 = 323.5
662 - 338.5 = 323.5
As you can see, the halfway number is 323.5 higher than 15 and 323.5 lower than 662. Therefore, our halfway between answer of 338.5 above is correct.
Halfway Between
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Halfway Between 15 and 663
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