How could adding a new state to the union add to the conflict over slavery?

It would be a conflict because they would have to decide whether that state would be a slave state or a free state. And both sides were not willing to compromise because the power balance in congress would be broken depending on that state.

12 days because 1/4 is 25% of 100 if 100 is equal to 1 pound then multiply 3 by 4 which equals 12