The answer to your problem would be 400 because to find the answer you need to multiply 120 by .3 to get the answer because 3 % means per 100 and that is why you make it .3 hope i help.
Answer:
pls write question correctly so I can answer it
Okay well it kept saying that I for some reason was not using appropriate words so my long response got deleted.
tldr; we can treat this like a box that we put something into (x) and we get something back from it (y).
We can then take this data we get and put it in a table. This is useful for finding patterns.
I will post a picture of what a table may look like.
Hope this Helps!
Children = .65 * people
people = 520 / .65
800 people were in attendance
2x-2+x+5=90
3x+3=90
-3 -3
3x/3 =87/3
x=29