It would be 2.5% because you would set it up as 0.5=p x 20 you divide each side by 20 which should equal 0.025. you move the decimal two places to the right so p actually equals 2.5%
I would do activities with him/her that they love so that they feel better and they forget about whatever they are feeling bad about.
For example if Ronin loves to go to Mcdonalds, I would go to Mcdonalds
