(9/20-7/8):(-7/45-2/9)

Question

(9/20-7/8):(-7/45-2/9)

Comments

Можно без объяснения

Answer 1

9/20-7/8=18/40-35/40= -17/40
-7/45-2/9= -7/45-10/45= -17/45
-17/40: (-17/45)= 17/40×45/17=9/8=1 1/8