You can easily find Harry´s amount of money by simply dividing Jon´s money by 3 and then multiplying the quotient by 2.
72 / 3 = 24
24 x 2 = 48
Harry has $48
You can find Sheila´s money by dividing Harry´s money by 6 and multiplying its quotient by 5.
48 / 6 = 8
8 x 5 = 40
Sheila has $40