When you ask "What number is halfway between 28 and 91?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=91.
To find the number halfway between 28 and 91, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 91 into our formula, we get:
(28 + 91)/2 = 59.5
Thus, the number halfway between 28 and 91 is 59.5.
To check that our answer is correct, we subtract 28 from 59.5 and subtract 59.5 from 91 and compare the two numbers:
59.5 - 28 = 31.5
91 - 59.5 = 31.5
As you can see, the halfway number is 31.5 higher than 28 and 31.5 lower than 91. Therefore, our halfway between answer of 59.5 above is correct.
Halfway Between
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Halfway Between 28 and 92
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