Respuesta :

wegnerkolmp2741o

to write one thank you  card it takes 1/16 of an hour


1 card  * 3/4 hour  

--------       ---------      =         the hours cancel and you are left with cards

1/16 hour       1



3/4

------                                  copy dot flip

1/16      



3/4 * 16/1


12 cards