Respuesta :

taniaorozco
13/20 - 2/7 + 11/35

find the least common denominator which is 140.

(13 × 7/20 × 7) - (2 × 20/7 × 20) + (11 × 4/35 × 4)

91/140 - 40/140 + 44/140

91 - 40 + 44/140

95/140

19/28   <<< answer

hope this helped, God bless!