When you ask "What number is halfway between 73 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=73 and Y=221.
To find the number halfway between 73 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 73 and 221 into our formula, we get:
(73 + 221)/2 = 147
Thus, the number halfway between 73 and 221 is 147.
To check that our answer is correct, we subtract 73 from 147 and subtract 147 from 221 and compare the two numbers:
147 - 73 = 74
221 - 147 = 74
As you can see, the halfway number is 74 higher than 73 and 74 lower than 221. Therefore, our halfway between answer of 147 above is correct.
Halfway Between
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Halfway Between 73 and 222
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