When you ask "What number is halfway between 77 and 228?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=77 and Y=228.
To find the number halfway between 77 and 228, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 77 and 228 into our formula, we get:
(77 + 228)/2 = 152.5
Thus, the number halfway between 77 and 228 is 152.5.
To check that our answer is correct, we subtract 77 from 152.5 and subtract 152.5 from 228 and compare the two numbers:
152.5 - 77 = 75.5
228 - 152.5 = 75.5
As you can see, the halfway number is 75.5 higher than 77 and 75.5 lower than 228. Therefore, our halfway between answer of 152.5 above is correct.
Halfway Between
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Halfway Between 77 and 229
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