Fractions with our class

This morning we started of our maths finding fractions using the people in our class.  We were luck that we only had 20 people at maths time so it was a nice easy number to work with. We started off as a whole, then we split in half, then into quarters and then into one tenth.
Using our photos which show what one tenth of 20 is, I wonder if you can leave a comment to work out what one fifth of 20 is....