9per5d tambah 4per8=

9/5 + 4/8
72/40 + 20/40
92/40
23/10





^_^

= 9/5 + 4/8

dijadikan per (/) 40

40 : 5 × 9 = 72
jadi, 72/40

40 : 8 × 4 = 20
jadi, 20/40

= 72/40 + 20/40
= 92/40
= 2 12/40
= 2 3/10