When you ask "What number is halfway between 67 and 172?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=67 and Y=172.
To find the number halfway between 67 and 172, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 67 and 172 into our formula, we get:
(67 + 172)/2 = 119.5
Thus, the number halfway between 67 and 172 is 119.5.
To check that our answer is correct, we subtract 67 from 119.5 and subtract 119.5 from 172 and compare the two numbers:
119.5 - 67 = 52.5
172 - 119.5 = 52.5
As you can see, the halfway number is 52.5 higher than 67 and 52.5 lower than 172. Therefore, our halfway between answer of 119.5 above is correct.
Halfway Between
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Halfway Between 67 and 173
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