When you ask "What number is halfway between 79 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=79 and Y=221.
To find the number halfway between 79 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 79 and 221 into our formula, we get:
(79 + 221)/2 = 150
Thus, the number halfway between 79 and 221 is 150.
To check that our answer is correct, we subtract 79 from 150 and subtract 150 from 221 and compare the two numbers:
150 - 79 = 71
221 - 150 = 71
As you can see, the halfway number is 71 higher than 79 and 71 lower than 221. Therefore, our halfway between answer of 150 above is correct.
Halfway Between
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Halfway Between 79 and 222
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