7 9/10 - 1 1/4 - 3 2/5 pliss jawab

7 9/10 - 11/4 - 3 2/5
= 7 18/20 - 55/20 - 3 8/20
= (5 58/20 - 55/20) - 3 8/20
= 5 3/20 - 3 8/20
= 4 23/20 - 3 8 /20
= 1 15/20
= 1 3/4

semoga membantu :)

7 9/10 - 11 /4 - 3 2/5
79/10 - 11 / 4 - 17/5

Cari terlebih dahulu KPKnya.
KPKnya yaitu 20.

158 - 55 - 68 35 5 7
------------------- = ----- : --- = ----
20 20 5 4