When you ask "What number is halfway between 73 and 428?" 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=428.
To find the number halfway between 73 and 428, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 428 into our formula, we get:
(73 + 428)/2 = 250.5
Thus, the number halfway between 73 and 428 is 250.5.
To check that our answer is correct, we subtract 73 from 250.5 and subtract 250.5 from 428 and compare the two numbers:
250.5 - 73 = 177.5
428 - 250.5 = 177.5
As you can see, the halfway number is 177.5 higher than 73 and 177.5 lower than 428. Therefore, our halfway between answer of 250.5 above is correct.
Halfway Between
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Halfway Between 73 and 429
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