$-\dfrac{45}{30}$ in lowest form is

$-\dfrac{45}{30}$ in lowest form is
  1. $-\dfrac{3}{2}$
  2. $-\dfrac{2}{3}$
  3. $-\dfrac{9}{6}$
  4. $-\dfrac{15}{10}$

Solution

GCD $=15$: $-\dfrac{3}{2}$.

Asked in: IMO

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