Question

It takes Joey 1/16 of an hour to write one thank you card how many cards can he write in 3/4 of an hour ?

Answer 1

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