Suppose the park sold X tickets to adults on Saturday, then the number of tickets sold to the children would be 8X. (Its stated in the question that the sell tickets at a ratio of 8:1).
So,
Tickets sold to children= 8X
Tickets sold to Adults= X
According to question, The sold 147 more children tickets than adult tickets, so
(Number of children ticket sold) - (Number of adult tickets sold) should be equal to 147.
Children ticket sold - adult ticket sold. = 147
8X - X = 147
7 X= 147
X = 147/7
X = 21.
The number of tickets sold to adults = 21,
The number of tickets sold to children = 8X = 8*21=168
Total number of tickets sold on Saturday = 168 + 21 = 189.
