/Python/TypeError: unsupported operand type(s) for +: 'Fraction' and 'Fraction'

TypeError: unsupported operand type(s) for +: 'Fraction' and 'Fraction'

The green shape is a dilation of the black shape. What is the scale factor of the dilation?
-10
10
-10
10
0

Unsupported operand type(s) for / 'fraction' and 'fraction'

gcden = gcd(numerator,denominator)
Traceback (most recent call last):
  File "zwölf.py", line 127, in <module>
    f3 = f1 * f2 
TypeError: unsupported operand type(s) for *: 'Fraction' and 'Fraction'

Source: codeproject.com

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