20 books are divided parcels, each parcel contains one fifth of the total. If a librarian wants to buy 16 books how many fifths should he take?

x=4

Step-by-step explanation:

1/5 of the total= 1 parcel= 1/5 of 20= 4

So one parcel is 4 books

Then you can set up an equation 16=4x where x = number of parcels.

4x = 16

4x/4 = 16/4

x=4

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

step-by-step explanation: