When you ask "What number is halfway between 50 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=50 and Y=221.
To find the number halfway between 50 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 221 into our formula, we get:
(50 + 221)/2 = 135.5
Thus, the number halfway between 50 and 221 is 135.5.
To check that our answer is correct, we subtract 50 from 135.5 and subtract 135.5 from 221 and compare the two numbers:
135.5 - 50 = 85.5
221 - 135.5 = 85.5
As you can see, the halfway number is 85.5 higher than 50 and 85.5 lower than 221. Therefore, our halfway between answer of 135.5 above is correct.
Halfway Between
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Halfway Between 50 and 222
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