jada and diego baked a large batch of cookies. Continue in description

Question

they gave 1/4 of the cookies to their teachers. They noticed that one of their remaining cookies was burnt, so they threw it away. Then, they delivered 2/5 of the cookies they had left to a local nursing home. Next they gave 3 cookies to some neighborhood kids After this, they wrapped up 2/3 of the remaining cookies to save for their friends. After wrapping te cookies for their friends, Jada and Diego still had 15 cookies left. How many cookies did they bake in total?

Answer 1

At the end they had 15 cookies

Before that they had 45 cookies (2/3 went to friends)

Before that they had 48 cookies (3 went to kids)

Before that they had 80 cookies (2/5 went to nursing home)

Before that they had 81 cookies (threw one away)

Before that they had 108 cookies (1/4 went to teachers)

QED