(12/13•14/17)•(17/14•13/24)

Question

(12/13•14/17)•(17/14•13/24)

Answer 1

(12/13×14/17)×(17/14×13/24)=(12/13×13/24)×(14/17×17/14)=

=(1×1/2)×1=1/2×1=1/2

Answer 2

1)12/13*14/17=168/221 2)17/14*13/24=221/336 3)168/221*221/336=1/2