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9 /9 x 9/18 x 9/27 x 9/36 x9/45 is equal

9 /9 x 9/18 x 9/27 x 9/36 x9/45 is equal

Explanation

= 9 /9 x 9/18 x 9/27 x 9/36 x 9/45 

= 1 x 1/2 x 1/3 x 1/4 x 1/5

= 1 x 1 / 2 x 3 x 4 x 5

= 1 x 1/ 120

= 1/ 120