|work it out!|
So I make them do this simple activity on paper or graph paper.
To multiply 1/7 and 1/5, draw a 7 by 5 rectangle and sill it with lines as shown. Shade 1/7th of it and then shade 1/5th of it. How many rectangles are shaded twice?...that is the answer.
This is what leads to really the meaning of 1/5th of 1/7th. That we first find 1/7th and then 1/5th of 1/7th.
One can take this forward using pictures or stories...up to us!