When you ask "What number is halfway between 69 and 399?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=399.
To find the number halfway between 69 and 399, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 399 into our formula, we get:
(69 + 399)/2 = 234
Thus, the number halfway between 69 and 399 is 234.
To check that our answer is correct, we subtract 69 from 234 and subtract 234 from 399 and compare the two numbers:
234 - 69 = 165
399 - 234 = 165
As you can see, the halfway number is 165 higher than 69 and 165 lower than 399. Therefore, our halfway between answer of 234 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 69 and 400
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