:(выполните деление ) 1) 3/4 : 5/7 = ? 2) 5/18 : 25/27=? 3) 9/16 : 3/64 = ? 4) 25/72 : 45/63 = ? 5) 4/9 : 7/8 = ? 6) 6/25 : 12/35 = ? 7) 8/65 : 4/13 = ? 8) 48/49 : 32/63 = ? умоляю!

1.3/4:5/7=3/4*7/5=21/20; 2.5/18*27/25=3/10. 3.9/16*64/3=12. 4 ,25/72*63/45=7/72, 5.4/9*8/7=32/63. 6. 6/25*35/12=7/10. 7. .8/65*13/4=2/5. 8. 48/49*63/32=27/14.