When you ask "What number is halfway between 63 and 102?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=63 and Y=102.
To find the number halfway between 63 and 102, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 102 into our formula, we get:
(63 + 102)/2 = 82.5
Thus, the number halfway between 63 and 102 is 82.5.
To check that our answer is correct, we subtract 63 from 82.5 and subtract 82.5 from 102 and compare the two numbers:
82.5 - 63 = 19.5
102 - 82.5 = 19.5
As you can see, the halfway number is 19.5 higher than 63 and 19.5 lower than 102. Therefore, our halfway between answer of 82.5 above is correct.
Halfway Between
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Halfway Between 63 and 103
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