Plus 10%
The magician holds a £20 note in his otherwise empty hands. He folds the note in half, then in half again, then tips out a £2 coin.
This sleight of hand can be performed with other objects: paper; lottery tickets; poker chips; cheese biscuits. Use your imagination.
You can also view this trick on YouTube at https://youtu.be/vuAWVrhrGOQ
You can see all the previous magic lessons here.