When you ask "What number is halfway between 75 and 220?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=75 and Y=220.
To find the number halfway between 75 and 220, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 220 into our formula, we get:
(75 + 220)/2 = 147.5
Thus, the number halfway between 75 and 220 is 147.5.
To check that our answer is correct, we subtract 75 from 147.5 and subtract 147.5 from 220 and compare the two numbers:
147.5 - 75 = 72.5
220 - 147.5 = 72.5
As you can see, the halfway number is 72.5 higher than 75 and 72.5 lower than 220. Therefore, our halfway between answer of 147.5 above is correct.
Halfway Between
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Halfway Between 75 and 221
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