Multiply.
−2/21×27/40
enter your answer as a fraction, in simplified form, in the box.

The answer is:  - (9/40).


-2/21  *  27/40  = ?

The  "-2" cancels to "1" ;  and the "40" cancels to "-20"  ;
    since: "40÷ -2 = -20" ; and since: "-2 ÷ -2 = 1".

The "21" cancels to "3" ; and the "27" cancels to "9" ; 
Since:  "21÷3 = 7" ;  and since:  "27÷3 = 9.

So, we can rewrite the problem as follows:


1/7 *  9/-20 = (1*9) / (7* -20)  =  9 / -140  = - (9/40).