When you ask "What number is halfway between 21 and 75?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=75.
To find the number halfway between 21 and 75, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 75 into our formula, we get:
(21 + 75)/2 = 48
Thus, the number halfway between 21 and 75 is 48.
To check that our answer is correct, we subtract 21 from 48 and subtract 48 from 75 and compare the two numbers:
48 - 21 = 27
75 - 48 = 27
As you can see, the halfway number is 27 higher than 21 and 27 lower than 75. Therefore, our halfway between answer of 48 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 21 and 76
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