70/130 = 7×10/13×10= 7/13
310/465 = 62×5/93×5= 62/93 делим на 31
получается 2/3
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70/130 = 7×10/13×10= 7/13
310/465 = 62×5/93×5= 62/93 делим на 31
получается 2/3