The ratio between the child tickets to adult tickets is 8 : 1
The child tickets are more by 147
Let us use the ratio method to solve the question
Child : Adult : difference
8 : 1 : 7 (8 - 1)
x : y : 147
By using cross multiplication

Divide both sides by 7 to find x


Divide both sides by 7 to find y

The total number of tickets = 168 + 21 = 189
The total number of tickets is 189