1. 6/7:2=6/7:/2/1=6/7*1/2=6/12=3/4;
2. 8/25:4=8/25:4/1=8/25*1/4=8/100=2/25;
3. 15/34:3=15/34:3/1=15/34*1/3=15/102;
4. 5/8:5=5/8:5/1=5/8*1/5=5/40=1/8.
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6/7*1/2=3/7
8/25*1/4=2/25
15/34*1/3=5/34
5/8*1/5=1/8
1. 6/7:2=6/7:/2/1=6/7*1/2=6/12=3/4;
2. 8/25:4=8/25:4/1=8/25*1/4=8/100=2/25;
3. 15/34:3=15/34:3/1=15/34*1/3=15/102;
4. 5/8:5=5/8:5/1=5/8*1/5=5/40=1/8.