Halfway Between 99 and 421

When you ask "What number is halfway between 99 and 421?" 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=421.

Halfway Between Line

To find the number halfway between 99 and 421, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 99 and 421 into our formula, we get:

(99 + 421)/2 = 260

Thus, the number halfway between 99 and 421 is 260.

To check that our answer is correct, we subtract 99 from 260 and subtract 260 from 421 and compare the two numbers:

260 - 99 = 161
421 - 260 = 161

As you can see, the halfway number is 161 higher than 99 and 161 lower than 421. Therefore, our halfway between answer of 260 above is correct.

Halfway Between
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Halfway Between 99 and 422
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