The next number in the sequence will be 12.
Explanation
The given sequence is: Â 8, 15, 14, 9, 1, 6, 3
If we express these numbers in words, then we can see that the words are in alphabetical order, like....
Eight, Â Fifteen, Â Fourteen, Â Nine, Â One, Â Six, Â Three
There are two numbers 10 and 12 in the options which starts with letter 'T' , but  alphabetically 'Twelve' will be the next number after 'Three'
So, the next number in the sequence will be 12.
There are 54 people at the party.
18 people are wearing red which means that 36 people are not wearing red
54 - 18 = 36
The fraction represents the 36 people at the party that are wearing no red. We can find what percent of the people at the party are not wearing red by turning
into a percent.
can be reduced to
 by dividing both the numerator and denominator by the greatest common factor of 36 and 54.
2 ÷ 3 = 0.667
0.667 × 100 = 66.67%
Therefore, 66.67% of the people at the party are not wearing red