hasil dari 256 3\8-243 2\5

256 3/8 - 243 2/5
= 2.051/8 - 1.217/5
= 10.255/40 - 9.736/5
= 519/40
= 12 39/40

Semoga bisa membantu...

256 3\8 - 243 2\5
= (256×8+3)/8 - (243×5+2)/5
= 2051/8 - 1217/5
= [(2051×5) - (1217×8)]/40
= (10.255 - 9.736)/40
= 519/40
= 12 39/40