Peter sells 2/3 lb. of rice every 1/3 hour. how much rice does peter sell in an hour? explain

For this you should set up a proportion.

2/3. 1/3
=
x. 3/3

Then cross multiply 3/3 x 2/3 and divide by 1/3

2/3 x 3/3 = 6/9

6/9 \ 1/3 = 6/9 x 3/1 = 18/1

Peter sells 18 bags of rice per hour.