Oh, what a happy little question! The reciprocal of a fraction is when you flip it upside down. So, the reciprocal of 7 over 18 is 18 over 7. Just like painting a beautiful landscape, math can be a peaceful and joyful experience when we take our time to understand it.
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The reciprocal of 18/7 is 7/18.
The reciprocal of 7 is 1/7 The reciprocal of an integer a is the fraction 1/a
18/7...not
6/7
7/1