Astrip of wood 78 inches long is to be cut into pieces of 3 and 3/4 inches long how many pieces can be cut

Namely, how many times does 3¾ go into 78?  well, is just their quotient.

let's firstly convert the mixed fraction to "improper", and then divide,



so, if we nevermind the 4/5 part, only 20 whole of those then.