When you ask "What number is halfway between 90 and 157?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=90 and Y=157.
To find the number halfway between 90 and 157, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 90 and 157 into our formula, we get:
(90 + 157)/2 = 123.5
Thus, the number halfway between 90 and 157 is 123.5.
To check that our answer is correct, we subtract 90 from 123.5 and subtract 123.5 from 157 and compare the two numbers:
123.5 - 90 = 33.5
157 - 123.5 = 33.5
As you can see, the halfway number is 33.5 higher than 90 and 33.5 lower than 157. Therefore, our halfway between answer of 123.5 above is correct.
Halfway Between
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Halfway Between 90 and 158
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