4/5 : 2/5= 4/5*5/2=2
4/5:4/7=4/5*7/4=7/5=1 2/5
4/5:7/4=4/5*4/7=16/35
4/5:1/2=4/5*2=8/5=1 3/5
4/5:4=4/5*1/4=4/20=1/5
4/5:1/4=4/5*4=16/5=3 1/5
4/5:1=4/5*1=4/5
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4/5 : 2/5= 4/5*5/2=2
4/5:4/7=4/5*7/4=7/5=1 2/5
4/5:7/4=4/5*4/7=16/35
4/5:1/2=4/5*2=8/5=1 3/5
4/5:4=4/5*1/4=4/20=1/5
4/5:1/4=4/5*4=16/5=3 1/5
4/5:1=4/5*1=4/5
Ответ: