Respuesta :

Answer:105 thats with reducing to  

Step-by-step explanation: 15(21/3)

                            then 15/1 x 21/3 then simplify

                                 15 x 21 over 1 x 3 then simplify 315/3 then reduce then get 105 is your anwser

                                                 

The answer is 105 have a great day