To find out how many tickets Hong has left, we first need to calculate the total number of tickets he initially purchased.
Hong bought 9 packs of 16 tickets each, so we calculate:
\[ \text{Total tickets} = 9 \times 16 = 144 \text{ tickets} \]
Next, we need to subtract the number of tickets he has used so far. However, it seems that the amount of tickets he has used is missing from your message. If you provide that number, I can help you find out how many tickets he has left.
Assuming he used \( x \) tickets, the calculation for the tickets remaining would be:
\[ \text{Tickets left} = \text{Total tickets} - \text{Used tickets} = 144 - x \]
Please provide the number of used tickets \( x \) so we can proceed with the calculation!