You said: "a fraction with the numerator smaller than the denominator", so test cases 3 to 6 are not consistent to this sentence. :-/
The Test Suite and problem statement are now consistent with each other, but I don't think anybody learned at school to write 1 9/7, rather than 2 2/7.
Other issues with the Test Suite (or problem statement): FIRSTLY, 1 2/3 is equal to 1 4/6, or 1 6/9, et cetera, but only the first option is accepted in the Test Suite. SECONDLY, the rounding used in the inputs means that more correct answers would be e.g. 1.33 = 1 33/100. LASTLY, there is no possible way to know that 2.00 should be represented as 1 5/5, rather than 1 4/4, or 1 3/3 et cetera.
Which values occur exactly three times?
Angle between two vectors
03 - Matrix Variables 5
most frequent character
Are you in XY plane?
Find supported functions
Find offset of given matrix element from first matrix element
Find offset of an element of a multi dimensional matrix
Let's get back to school, and create multiplication tables
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