It’d be great if you can show work too

Easy points boii. read it. ya. fresh

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?