Halfway Between 100 and 221

When you ask "What number is halfway between 100 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=100 and Y=221.

Halfway Between Line

To find the number halfway between 100 and 221, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 100 and 221 into our formula, we get:

(100 + 221)/2 = 160.5

Thus, the number halfway between 100 and 221 is 160.5.

To check that our answer is correct, we subtract 100 from 160.5 and subtract 160.5 from 221 and compare the two numbers:

160.5 - 100 = 60.5
221 - 160.5 = 60.5

As you can see, the halfway number is 60.5 higher than 100 and 60.5 lower than 221. Therefore, our halfway between answer of 160.5 above is correct.

Halfway Between
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Halfway Between 100 and 222
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