When you ask "What number is halfway between 73 and 216?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=73 and Y=216.
To find the number halfway between 73 and 216, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 216 into our formula, we get:
(73 + 216)/2 = 144.5
Thus, the number halfway between 73 and 216 is 144.5.
To check that our answer is correct, we subtract 73 from 144.5 and subtract 144.5 from 216 and compare the two numbers:
144.5 - 73 = 71.5
216 - 144.5 = 71.5
As you can see, the halfway number is 71.5 higher than 73 and 71.5 lower than 216. Therefore, our halfway between answer of 144.5 above is correct.
Halfway Between
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Halfway Between 73 and 217
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