Respuesta :

1/11 x ? = 1

1/11 x 11 = 1

^^^ This is basically

1. 11. 11
— x — = — = 1
11. 1. 11

The 11 also crosses itself out because of cross multiplication so it could be 1/1

The “what” is 11

1/11 times 11 is equal to 1 since there are 11 parts in the fraction. (If that makes sense)