Answer:
27 people
Step-by-step explanation:
Out of 10 people, 7 people ordered a hot dog.
Multiply both sides by 9:
Out of 90 people,
people ordered a hot dog.
Thus, 63 people ordered a hot dog.
Number of people who did not order a hot dog: 
12,351 ~ 12,400 I rounded 12,351 to 12,400 because when there is 5 when you round,the hundred goes up.
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I can’t solve it sorry....................................................<3
like i said the ? would be a 5