Jawaban:

1. 0,9

2. 0,7

3. 10

4. 3

5. 6/25

6. 1 13/77

7. 1

8. 1 1/4

9. 2

10. 2 2/3

11. 5/48

12. 13/55

13. 39/44

14. 1 9/54

15. 1 3/12

16. 3/4

17. 49/55

18. 4/507

19. 4

20. 1 111/117

Penjelasan dengan langkah-langkah:

1. 8/10 : 2 6/9 = 8/10 : 24/9 = 8/10 x 9/24 = 9/10 = 0,9

2. 3/5 : 18/21 = 3/5 x 21/18 = 21/30 = 7/10 = 0,7

3. 8 : 4/5 = 8/1 : 4/5 = 8/1 x 5/4 = 10/1 = 10

4. 10 : 3 1/3 = 10/1 : 10/3 = 10/1 x 3/10 = 3/1 = 3

5. 12/15 : 3 1/3 = 12/15 : 10/3 = 12/15 x 3/10 = 6/25

6. 5 5/7 : 4 8/9 = 40/7 : 44/9 = 40/7 x 9/44 = 90/77 = 1 13/77

7. 2 5/10 : 2 6/12 = 25/10 : 30/12 = 25/10 x 12/30 = 30/30 = 1

8. 4 2/12 : 3 1/3 = 50/12 : 10/3 = 50/12 x 3/10 = 5/4 = 1 1/4

9. 12 2/3 : 6 1/3 = 38/3 : 19/3 = 38/3 x 3/19 = 2/1 = 2

10. 18 : 6 6/8 = 18/1 : 54/8 = 18/1 x 8/54 = 8/3 = 2 2/3

11. 14/16 : 8 2/5 = 14/16: 42/5 = 14/16 x 5/42 = 5/48

12. 9/11 : 3 6/13 = 9/11 : 45/13 = 9/11 x 13/45 = 13/55

13. 4 1/11 : 4 8/13 = 45/11 : 60/13 = 45/11 x 13/60 = 117/132 = 39/44

14. 5 1/4 : 4 3/6 = 21/4 : 27/6 = 21/4 x 6/27 = 63/54 = 1 9/54

15. 6 7/8 : 5 3/6 = 55/8 : 33/6 = 55/8 x 6/33 = 15/12 = 1 3/12

16. 1 1/2 : 1 3/5 : 3 3/4 = 3/2 : 8/5 : 15/4 = 3/2 x 5/8 x 4/15 = 3/4

17. 2 1/3 : 1 4/6 : 1 8/14 = 7/3 : 10/6 : 22/14 = 7/3 x 6/10 x 14/22 =147/165 = 49/55

18. 3/7 : 5 4/57 : 9 3/4 = 3/7 : 39/7 : 39/4 = 3/7 x 7/39 x 4/39 = 4/507

19. 4 1/5: 1 2/5 : 3/4 = 21/5 : 7/5 : 3/4 = 21/5 x 5/7 x 4/3 = 12/3 = 4

20. 6 1/3 : 5/6 : 3 9/10 = 19/3 : 5/6 : 39/10 = 19/3 x 6/5 x 10/39 = 228/117 = 1 111/117

maaf klo salah, semangat terus belajarnya