Question

simplify -3upon5 ×-10 upon 9 × 21upon -4 ×(-6)

Answer 1

-3/5 x -10/9 x 21/-4 x -6
30/45 x 21/4 x -6
=2/3 x 63/2
=21

Answer 2

hi,

-3/5 x -10/9 x 21/ 24

after simplification,

we get -1 x -1 x 7/ 12      
 
             1 x 7/12   
           
              = 7/12

therefore, the answer is 7/12

hope it helps........