When you ask "What number is halfway between 99 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=99 and Y=662.
To find the number halfway between 99 and 662, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 662 into our formula, we get:
(99 + 662)/2 = 380.5
Thus, the number halfway between 99 and 662 is 380.5.
To check that our answer is correct, we subtract 99 from 380.5 and subtract 380.5 from 662 and compare the two numbers:
380.5 - 99 = 281.5
662 - 380.5 = 281.5
As you can see, the halfway number is 281.5 higher than 99 and 281.5 lower than 662. Therefore, our halfway between answer of 380.5 above is correct.
Halfway Between
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Halfway Between 99 and 663
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