tolong di jawab// buat pr besok!!

jadikan pecahan biasa
11. 21/4 ÷27/6= 21/4×6/27=126/108
= 7/6 =1 1/6

12. 55/8 ÷ 33/6= 55/8×6/33= 330/264
=5/4= 1 1/4

13. 3/2 ÷ 8/5 ÷ 15/4= 3/2×5/8×4/15= 60/240
=1/4

14. 7/3 ÷ 10/6 ÷ 22/14
=7/3×6/10×14/22
=49/55

15. 9/4÷ 8/3 ÷ 7/4
=9/4×3/8×4/7
=108/224
=27/56