8/9 x 5/7 x 1/8 equals what? Write your answer in simplest form.

We'll work as follows.

×89×5718

=×189×57181

Canceling the common factor 

8

=563

Multiplying the numerators;
Multiplying the denominators

Here is the answer.
 

563

Just multiply all of the numerators together and all of the denominators to gether    to get    40/504   = 5/63  (using the calculator!)

8/9 x 5/7 x 1/8

Here's another trick that sometimes works well......since we're just multiplying numerators/denominators, we can swap these around,  if we wish.....re-write this as :

8/8 x 5/7 x 1/9  =

1 x 5/7 x 1/9  =

5/7 x 1/9  =

5/63   [note that we didn't have to worry about "reducing" any fractions......]