The is used for an event that will continue to occur in the future until a specific time.
a. simple future
b. future perfect
c. future progressive
d. future perfect progressive

steps:

1. do 28-12= 16 girls

2. your ratio is 12: 16

3. your answer is b. 3/4

4. this correct because

12 divided by 4 is 3

16 divided by 4 is 4

5. your answer is 3/4

i don't really know the circumstances. i personally think not due to it not being fair for all parties and how hated i'd become if i thought it was a good thing.