
When you ask "What number is halfway between 73 and 660?" 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=660.

To find the number halfway between 73 and 660, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 660 into our formula, we get:
(73 + 660)/2 = 366.5
Thus, the number halfway between 73 and 660 is 366.5.
To check that our answer is correct, we subtract 73 from 366.5 and subtract 366.5 from 660 and compare the two numbers:
366.5 - 73 = 293.5
660 - 366.5 = 293.5
As you can see, the halfway number is 293.5 higher than 73 and 293.5 lower than 660. Therefore, our halfway between answer of 366.5 above is correct.
Halfway Between
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