5) 15/16:5/8*1 1/9=3/2*10/9=5/3=1 2/3
7) 4 9/38*5/23:7/19=161/38*5/23:7/19=35/38:7/19=35/38*19/7=5/2=2 1/2 или 2,5
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5) 15/16:5/8*1 1/9=3/2*10/9=5/3=1 2/3
7) 4 9/38*5/23:7/19=161/38*5/23:7/19=35/38:7/19=35/38*19/7=5/2=2 1/2 или 2,5