Draw a set of objects where you can find a fractional part of the group using the total number of objects by using subgroups

Although I, unfortunately, can't draw anything on here, I have some tips for you

-Draw 15 small circles

-Draw a big circle around 5 of small circles

-Draw a big circle around another 5 small circles

-Draw a third big circle around the remaining 5 small circles

You have just divided up the circles. So, choose one big circle. That is a subgroup. Remember how many big circles you drew? You drew three. So this one circle is one subgroup out of the total number of objects. This subgroup is 1/3 of the total amount of objects