1 6/15x2 8/9-2,7x1 1/8=

Semoga benar dan bermanfaat :-))

1 6/15 × 2 8/9 - 2,7 × 1 1/8
= 21/15 × 26/9 - 27/10 × 9/8
= 546/135 - 243/80
= 182/45 - 243/80
= 2.912/720 - 2.187/720
= 725/720
= 1 5/720
= 1 1/144

Semoga bisa membantu...