In the course of the us civil war, how did tactics change? . a. battles at sea were more decisive than those on land.. b. defensive trench warfare became more common.. c. massed groups of soldiers charged the enemy.. d. more of the responsibility was borne by the cavalry.

honestly you should get that checked out because it really isn't normal

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".