Tolong pake cara............

1. 2/5×4/7
= 20/35= 4/7
2. 3/5×6/7
= 18/35
3. 4/5×9/10
= 36/50= 18/25
4. 6/7×7/8
= 42/56= 21/28= 3/4
5. 9/10×8/11
= 72/110= 36/55
6. 3/4:2/3= 3/4×3/2
= 9/8 = 1 1/8
7. 4/5:3/8= 4/5×8/3
= 32/15
8. 5/10:2/15= 5/10×15/2
= 75/20= 15/4
buat yang no.9 dan 10 sama caranya kaya gitu:) semoga membantu:) selamat belajar:)