In what ways did the scope and direction of the civil war change in 1863, and why

The American Civil war changed in 1863 for two reasons.  

Explanation:

First, the union changed the purpose of the struggle to end slavery to the Union. While Lincoln's declaration of liberation actually succeeded in giving freedom to some slaves, it gave African Americans freedom for the Union.

Second, the tide quickly turned against the Confederacy. The success of the Vicksburg campaign provided central control of the Mississippi River, and Lee's defeat at Gatesburg ended the north's invasion effort. The main reason of this war was long term of enslavement of African people in the country.  

lying without the limits of the several states; and may permit them, at such times, and in such manner as it

part a. there were 250 teenagers surveyed (100% of tenagers = 250)therefore 1 % = 250/100 = 2.5 76% = 1% x 76 = 2.5 x 76 = 190 teenagers of the 250 surveyed liked burgerspart b: jane surveyed 25% (which is equal to 50 teenagers, i.e. a quarter of the teenagers surveyed is 50) to get 100% we simply get 4 quarters, i.e. multiply 50 by 4 = 200 teenagers were surveyed by jane. part c: it is impossible to give an example where a percentage is greater than 100%, since, by definition , percentage means "per 100".