Hasil dari 2/7 : 4/5

2/7 ÷ 4/5 = 2/7 × 5/4
= 2×5 =10
=7×4 = 28
10÷2=5
28÷2=14

2/7÷4/5 = 5/14

2/7×5/4
=10/28
=5/14
jadi jawabannya yaitu 5/14