1) 6 1/4*1 1/35*2 1/3=25/4*36/35*7/3=15
2) 12 6/7*2/25*7/18=90/7*2/25*7/18=2/5
3) 15/16*1 13/27*2 4/25=15/16*40/27*54/25=3
1) 6 1/4*1 1/35*2 1/3=25/4*36/35*7/3=15
2) 12 6/7*2/25*7/18=90/7*2/25*7/18=2/5
3) 15/16*1 13/27*2 4/25=15/16*40/27*54/25=3