Ratio of child ticket and adult ticket is 8:1.
So we can let number of children tickets sold in Saturday = 8x
Number of adult tickets sold in Saturday = 1x = x
As given difference between child ticket and adult ticket in saturday = 147.
So 8x - x = 147
7x = 147
On dividing both sides by 7.
x = 21
So number of children tickets sold in Saturday = 8*21 = 168
Number of Adults ticket sold in Saturday = 1*21 = 21
So total number of ticket sold in Saturday = 168 + 21 = 189.