plissss donkkkk dibantu nomor 4.7.8.9.10. nya dibantu yaa plissssss

4) 1,275 = 1 275/1000 = 1 11/40 (a)

7) 16 2/3 % = 50/3 % = 50/300 = 1/6 (b)

8)
7 3/15 + 8 2/9 - 3 1/5
= 7 9/45 + 8 10/45 - 3 9/45
= 12 10/45
= 12 2/9 (b)

9)
5 1/2 × 2 1/3
= 11/2 × 7/3
= 77/6
= 12 5/6 (pilihan tdk ada)

10)
3a - b + 2c
= 3(1/2) - 2/3 + 2(4/5)
= 3/2 - 2/3 + 8/5
= 45/30 - 20/30 + 48/30
= 73/30
= 2 13/30 (a)