`( - 5 )/7 . 2/11 + ( - 5 )/7+ 1 ( - 5 )/7`
`= ( - 10 )/77 + ( - 5 )/7 + 2/7`
`= ( - 10 )/77 + (- 55 )/77 + 22/77`
`= ( - 65 )/77 + 22/77`
`= ( - 43 )/77`
__________________________________
`50% . 1 1/3 . 20 . 7/35 . 0,75`
`= 1/2 . 4/3 . 20 . 1/5 . 3/4`
`= ( 4/3 . 3/4 ) . ( 1/2 . 1/5 . 20 )`
`= 1 . ( 1/10 . 20 )`
`= 1 . 2`
`= 2`