Răspuns:
Explicație pas cu pas:
20 / (2/3) = 20 : (2/3) = 20 × (3/2) = 10 × 3 = 30 → raportul numerelor 20 si 2/3
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(2/3)/20 = (2/3) : 20 = (2/3) × 1/20 = 1/(3×10) = 1/30 → raportul numerelor 2/3 si 20
