what is the reciprocal of 3 1/2

2/7

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1/3.5 or another way is

3 1/2 = 7/2 and the reciprocal is 2/7

To find the reciprocal of a number, you simply flip the number upside down.

In this case, the number is 3 1/2. To flip it upside down, you can write it as a fraction by multiplying the whole number (3) by the denominator (2) and then adding the numerator (1). This gives us a fraction of 7/2.

Now, to find the reciprocal, we flip this fraction upside down by swapping the numerator and denominator. The reciprocal of 7/2 is 2/7.

Therefore, the reciprocal of 3 1/2 is 2/7.