15/4 + 3/9 - 17/12 =

15/4+3/9-17/12=
⇒3 3/4+1/3-1 5/12
⇒(3-1)+(3/4+1/3-5/12)
⇒2+(9/12+4/12-5/12)
⇒2+(13/12-5/12)
⇒2+8/12
⇒2 2/3

15/4 + 3/9 - 17/12

15×9×12/4×9×12 + 3×4×12/9×4×12 - 17×9×4/12×9×4

1.620/432 + 144/432 - 612/432

1.152÷9/432÷9

128÷8/48÷8

16÷2/6÷2

8/3 atau 2 2/3 (B)