Jada and diego baked a large batch of cookies.
They selected 1/4 of the cookies for there teachers
They threw away one burnt one
They delivered 2/3 of the remaining cookies to to a nursing home
They gave 3 cookies to neighborhood kids
They wrapped up the 2/3 of the remaining cookies for there friends
After this they had 15 cookies left. How many did they have to start with and how did u do it?? Please help